Design twitter - system design preparation

Feb. 22, 2020

Introduction

It is important for me to push myself hard to improve performance as a system design interviewer. I got lowest rating recently, since the interviewee thought that he wasted time to be interviewed. I like to put together a showcase to share with interviewees, strong players, good players, and just so-so players. So I can share the list at the end of each system design interview.

Showcase

I like to share the links in the following:

1. Strong player - I got rating as 1 out of 4 as an interviewer, here is his performance.
2. Strong player who works for booking.com
Here is the gist.
3. Very good player, Feb. 22, 2020, 10:00 AM. Here is the transcript. He is young graduate from university of Waterloo, Microsoft SDE II.



Long polling, the article link is here.

I am reading the book, Design large data intensive application. Recently I spent over a week to read book chapter related to data storage. If you like to learn more about my experience, continue to read.

If you like to learn more about LSM-Tree, please take a look my blog. I read book chapter of data storage, and then I spent over a week to read the book, but I could not understand it, so I did some research and found some good learning videos from Microsoft research. Here is the blog.

March 8, 2020
I like to ask system design API like Leetcode 355 Design twitter, my favorite discussion post is here.

March 8, 2020
Here is the article related to twitter design, and I use the content for me to evaluate the candidate for advanced web architecture. Topics like Trend topic and other things.

March 11, 2020 10:10 PM reading the design here.

March 22, 2020
showcase is here.

Expert Tips for Achieving Proper Running Form from Head to Toe

I got the article from the running club coach. Here is the link.

Efficient Portfolio Frontier - Financial Markets by Yale University #21

Here is the link.

Fee-Only Fiduciary

Here is the article.

Fiduciary

Most investors are not aware of a critical division of professionals in the world of financial services. This distinction lies between fee-only fiduciaries who are obligated to act in your best interest and commission-based agents and brokers who are required to act in the best interest of the companies that employ them. Even when people have some inkling about the differences, several important misconceptions continue about both the nature of the problem and an adequate solution.

The Efficient Frontier

Here is the article.

My favorite reading is to talk about 2008 bear market with 42% loss of SPX.

Consider the year starting in October 2008. The S&P 500 went from 1,166.36 to 1,057.08, down 9%. For the year, losing 9% seems like a relatively reasonable loss. But the roller-coaster ride bottomed out at 682.55 before recovering. Had you asked investors if they were willing to lose 42% and then from that point gain 55% (as measured from the new low), they might have balked at the volatility.

This is why time horizon matters. There is a reversion to the mean return, but it requires a long enough investment period to revert. Volatility in the long term is much less of an issue than it is in the short term.

Asset allocation and the efficient frontier

Here is the link.

I like the example in the article, the explanation is very good for me to understand how to build efficient portfolio and reduce volatility.

Many investors don't appreciate asset allocation or understand intuitively how a diversified portfolio can exceed the sum of its parts. After all, the capital asset pricing model (CAPM) suggests that return follows risk, and therefore you can't increase return and reduce risk at the same time. But CAPM is just a straight-line projection. And at the efficient frontier, the math produces nothing but curves.

The efficiency of an investment is measured by the greatest return for the lowest volatility. Blending a portfolio allocation can make it even more efficient by either boosting returns or lowering volatility.

To understand the math behind blended returns, let's start with a simple case of two investment choices and two years. Investment A goes up 30% the first year and 0% the second year. Investment B goes up 0% the first year and 30% the second year. If you invest in either A or B, you get a 30% return over two years. Your average volatility is 15%.

It seems no matter how you mix these two investments, you can't get more than a 30% return over two years. But you can. And you can lower your volatility as well.

Today In: Investing

Imagine a blended portfolio of half invested in A and half invested in B. The first year you would experience a 15% return, and the second year a 15% return. Your volatility would be 0%. Lower volatility means a more efficient portfolio.

You would have both lower volatility and higher returns. Compounding returns would produce a total return over the two years of 32.5%. You experience a higher return because after half of your portfolio invested in A grows by 30% the first year, you rebalance your portfolio. So half of the growth from investment A is rebalanced and put into investment B. Half the growth would experience another 30% growth the second year when investment B did better. Thus your total return for the two years would be 32.5%.

Actionable Items

Diversification is free lunch to reduce volatility. The example is given in MIT course 16. Portfolio management. Here is the link. The talk is from 48:00.

Diversification and free lunch, do not forget to rebalance.
Given two assets, A, B, I took notes, see my blog. Here is the link.

Efficient Portfolio Frontier

Here is the link.

capital market line and sharpe ratio in excel

Here is the link.

Graphing the efficient frontier for a two-stock portfolio in Excel

Here is the link.

It is easy to follow and learn how to calculate the efficient frontier for AT & T and Best buy.

I will try it once later on.

Unshakeable Summary: 10 Best Lessons from Tony Robbins

Here is the article.

Best Books for Beginner Investors (5 MUST-READS)

Here is the link.

Five books:

1. Unshakable
2. The little book of Common sense of investment - John Bogle
3. 
   

Tony

Unshakable - easy to digest

Chapter II: 7 freedom facts

Freedom fact #4
The stock market rises over time, despite many short-term setbacks

6個讓你保持巔峰的方法！【一流的人如何保持巔峰 書評】下集

Here is the link.

Peak performance state: THE RISE OF SUPERMAN by Steven Kotler

Here is the link.

6個讓你保持巔峰的方法！【一流的人如何保持巔峰 書評】-上集

Here is the link.

5 Strength & Conditioning Exercises For Runners | Simple S&C Exercises For Beginner Athletes

Here is the link.

What Is Core Strength & How To Improve It

Here is the link.

10-bagger stock to 60-bagger stock

Feb. 19, 2020

Introduction

Knowledge is power. I came cross the blog about last 10 years investment return on those stocks, Amazon, Microsoft, Netflix, Apple, Visa. I like to write down some thoughts and see how I can push myself to learn more about business and investment.

10-bagger to 60-bagger stocks

Here is the article.

过年十年，以Facebook、亚马逊、奈飞、谷歌、微软及苹果为代表的信息技术公司涨幅均接近10倍或以上，其中奈飞、亚马逊及苹果涨幅高达60倍、28倍及26倍，信息技术板块涨幅也高达700%。科技巨头在互联网时代展现了极强竞争力，苹果、微软、谷歌利用强大的技术能力搭建互联网底层设施，例如iPhone/iOS、Google Search/Android及Windows/Office，三者已成为不可或缺的互联网底层平台，而亚马逊、Facebook及奈飞则在应用层面利用先发优势和规模效应收割全球流量，并通过持续的投资并购加深壁垒。另一方面，大额回购也是科技巨头持续跑赢指数的关键所在。受减税政策影响，2018年美股回购金额高达8000亿美元，创历史新高，2019年全年预计仍保持在7000亿美元。科技巨头回购数额尤为巨大，3Q19科技公司占据回购金额TOP10中的5席。以苹果为例，2018年苹果宣布千亿美元回购计划，自此苹果屡次取得美股季度回购金额第一，占据历史季度回购金额TOP15中的10席。除苹果外，微软、谷歌、Facebook均授权并已执行数百亿美元的回购计划，支撑并推动公司股价上涨。展望2020，随着减税影响褪去，科技股回购预计仍将保持高位，但边际动能有所衰竭，或难以再创18年新高。

Top 10 companies

I like to read more carefully.

过年十年，以Facebook、亚马逊、奈飞、谷歌、微软及苹果为代表的信息技术公司涨幅均接近10倍或以上，其中奈飞、亚马逊及苹果涨幅高达60倍、28倍及26倍，信息技术板块涨幅也高达700%。

Facts:
Last 10 years, Facebook, Amazon, Netflix, Google, Microsoft and Apple's average have close to 10 times more. 

60 times - Netflix
28 times - Amazon
26 times - Apple
10 times - Microsoft

700% information sector 

Karen Finerman on: Finerman's Rules & Financial Smarts

Here is the link.

Karen Finerman’s Strategies for Life

Here is the link.

All About Risk, with Karen Finerman

Here is the link.

As a hedge fund manager and “The Chairwoman” on CNBC’s Fast Money, Karen Finerman knows a thing or two about taking risks. In this episode, Karen speaks candidly about her career, mistakes she’s made, and how she knew at age 15 that she wanted to be a risk arbitrageur.

EPISODE 4: ALL-STAR INVESTOR KAREN FINERMAN ON THE COSTLY MONEY MISTAKES MANY WOMEN ARE MAKING

Here is the link.

Be your own sugar daddy

Feb. 19, 2020

Introduction

US open champion Stephens Sloan posted on Instagram on Feb. 19, 2020 wearing t-shirt "Be your own sugar daddy". I like to work on a short research how I can be my own sugar daddy in 2020.

My own sugar daddy

How should I think about this statement?

I still remembered that I made mistakes back in 2009, I wasted time and was a victim of wishful thinking. I should have invested time to learn personal finance, and economy, recession and how to build wealth.

If I work hard back in 2009, then I will stay put and leave my par 401 K and IRA portfolio staying with Scottrade.com. I should have grown those $26,000 dollars with S & P 500 index.

Continue

Feb. 23, 2020 11:48 PM
I like to continue to work on this topic. I made so many mistakes in my investment starting from 2001. The first one related to VIGRX costed me over $10,000 dollars. I shared my mistake on wechat group recently.

Here is my post.

Dynamic Warm Ups

Here is the link.

Case study: Vertically traverse binary tree

Feb. 18, 2020

Introduction

It is my mock interview as an interviewer. I met a manager from FANG company (Facebook, Apple, Netflix, Google), and then I learned surprising a good idea how to write optimal solution for the algorithm. I like to write a short case study on this interview.

Case study

I will add more detail later.

Here is the gist.

Case study: design twitter

Feb. 18, 2020

Introduction

It is tough for me to be a system design interviewer. I could not probe the depth of technology as an interviewer, and I got lowest rating the first time. I like to do a short case study on this interview.

Case study

I will add more detail later.

Interviewee feedback

Interviewer feedback

First training 6 * 800 m

Feb. 18, 2020

Introduction

It is my first training day. I went to the training with other members, and we had to run six of 800 meters. I went to burnaby central middle school around 7:15 PM, and left 8:45pm. I like to write a short report about the training.

Training 

I got there early, so I ran 800 meters first to warmup. It was cold. And then I met the group.

We decided to warm up to run 2 km first. So I ran 2 km with others. And then we did some lunges together, warmup together.

And we started to run 6 of 800 m. Every 800 meters 3 minutes break.

I did not have wifi on my cellular phone, so I could not record my running using strava. I only recorded the warmup.

It is so much fun to run with so many people. I start to love running. The coach ran with me last circle, and he asked me how many circles I completed. I told him that I lost track. Actually in-between I took two bathroom break. He told me that I should record each 800 m time, so I can push myself to improve performance.

Understanding 48 minutes 5K

Feb. 17, 2020

Introduction

It is time for me to learn a new sports called 5K running. What I like to do is to join the running camp, and also learn from Chinese coach who is working on his Boston marathon training. Compared to 40 miles to run in Boston marathon, 5K training is much short distance. Vancouver is such great place to meet so many talent people and then I can quickly leverage their knowledge and wisdom to work on my new sports - running 5K in 2020.

Understanding 48 minutes 5K 

I just pushed myself to run 5000 meters, 3 miles. I did spend 48 minutes, and I just quickly looked up quora.com, and a lady worked in IBM in her 72 years old can complete in 35 minutes.

I like the discipline of running 5K. The coach told me that it is not good to walk, keep running. It is a mental game. I just could not believe that I was such a person who could do things surprising myself. I like to be a runner.

Karen Finerman: Secret Rules for Business and Life

Here is 22 minutes podcast.

Metropolitan Capital CEO Karen Finerman is a best-selling author and a CNBC panelist. Finding vast success in the male-dominated hedge fund world, she reveals how she's managed hundreds of millions of dollars while raising two sets of twins.

Karen Finerman: How Women Can Best Navigate The Workplace

Here is the article.

What are your top three career advice tips?

1.  Know that you will fail at some point, but learn from it. The lessons from that failure will be extremely valuable.

2.  Be flexible: Expect to change paths or industries at least once.

3.  Sometimes you have to go backward before you can go forward. The road is never straight and it isn't always in the same direction.

Purseonality Profile: Karen Finerman

Here is the article.

According to Sources Podcast | "Merger Masters" Series: Karen Finerman of Metropolitan Capital

Here is the link.

I like to spend time to listen the whole podcast over 40 minutes.

Article:

Woman in wall street

Karen Finerman Keynote part 2 of 2

Here is the link.

I like to train myself to take better hand-writing notes.

No shame to say that I cannot afford to buy something. IPhone may be out of style. But having your own money, never go out of style.

Karen Finerman Keynote part 1 of 2

Here is the link.


Karen Finerman, co-founder and CEO of Metropolitan Capital Advisors, Inc. and "The Chairwoman" on CNBC's Fast Money, speaks at JWI's financial literacy event for mothers and teens in New York City.


Book recommended: investment for dummys

Why I need more disciplined sports?

Feb. 17, 2020

Introduction

I had my first 5 K run since I joined a Chinese running train group, and the coaches like us to take 5 K test. As a tennis player, I found out that I could not run as people in running group. I like to write a short research how important it is to get through those running training and get back to my fitness.

Running group

I joined the group with runners, those are with more running experience. I had some difficult to discipline myself to run 5 K and non-stop. The coach ran with me last 2500 meters, and he told me that last half is mental game. I should let myself to run as I can. Every one in the training told me to work hard using Chinese, "加油"。

I can play tennis more than two hours. But running nonstop for 48 minutes is the first time and I knew how hard it is for me as a 53 years old, weight 192 lb today. I do not have to carry so many weight, and I am glad to choose running as my sports. I like to stay fit and one thing I can do is to learn the new sports, and meet those people with different mindset.

The strategy behind networking with Sallie Krawcheck and Varsha Rao | Fortune

Here is the link.

A finance pioneer-turned-entrepreneur and a new-economy star share their lessons on networks, entrepreneurism and building their careers. Karen Finerman, panelist of CNBC Fast Money speaks with Sallie Krawcheck of Ellevate and Varsha Rao of Airbnb.

Karen and Sallie are my favorite people and I like to watch their talk and learn something in 2020. I do think that networking is so important for me since I like to continue to work as a software programmer.

Career Advice from a Woman Who Ruled Wall Street | Sallie Krawcheck

Here is the link.

I like to review the video and share with my Chinese wechat group.

Net worth of Sallie Krawcheck is around $17.2 billion.

Nike Run Club Warm-Up

Here is the link.

The Perfect Warm-up and Cool Down for a 5K or 10K Race - Part 4 (Runtastic & RUN 10 FEED 10)

Here is the link.

Knee Pain When Running? | How To Avoid Runner's Knee

Here is the link.

My first 5K run in New Westminster

Feb. 17, 2020

Introduction

It is the first test run for Chinese iRun group. We had to take the run test and this was the first time in my life that I ran 5K nonstop.

First 5K run

The coach ran with last 5 circles with me since I am the last one in terms of speed. All team members told me work hard when they passed me, the fastest one passed me more than 4 times. The best one finished 5 K run with 24 minutes. My record is 48 minutes 30 seconds.

I learn the importance to warm up, and also how to push myself to limit. Do not stop. Last 4 ciricles are mental game. I just needed to run and do not think about stopping.

After I finally completed 5K, in less than 5 minutes, I felt normal and did not feel anything stressed.

I love running. With good coaches, I will definitely continue to train myself. My next run is Feb. 18, 7:30 PM, another 5 K run.

It is simple. I just need to push myself keep running 50 minutes. That is all.

5 MUST KNOW Tips to Start Running (BEGINNER TIPS!)

Here is the link.

5 Running Tips for Beginners 🏃 5 Things I Wish I Knew about Running from the Beginning

Here is the link.

Pace and motivation

average pace - burn in your lungs - slow down, try to breathe
slow down, take notice how fast you move
how far you can go instead
My body tells me that I cannot run
Me tell my body who is in charge.

How To Run Longer Distances

Here is the link.

1. Increase distance or intensity
2. Patient - brick - lay brick, 
3. Efficiency - 

How To Instantly Run 3x Longer On Your Next Run

Here is the link.

Running Form: Correct Technique and Tips to Avoid Injury

Here is the link.

HOW TO GET A 5K PB | Run A Faster 5k With These Speed Workouts

Here is the link.

Athletic drills

Here is the link.

Burnaby central middle school - two hours workout

Feb. 16, 2020

Introduction

I will take a running test 5 KM on Feb. 17, 2020 9:00 AM, so I went out to Burnaby central middle school to prepare for my test.

My workout

It is the first visit of the running court. I like the place and spent over two hours to prepare for my tomorrow's test.

Case study: vertical traverse of binary tree algorithm

Feb. 16, 2020

Introduction

It was my 10:00 AM mock interview. I wrote down the algorithm and then asked the interviewee worked on the algorithm, and I would go back to home in 10 minutes. I like to document my mock interview and the interviewee's super good performance.

Case study

I will add more detail later.

Here is the link.

Deer lake theater 9:00 AM meetup

Feb. 16, 2020

Introduction

It is my frugal life. I chose to join a Chinese running group, and then we met at 9:00 AM after 30 minutes running.

Deer lake theater

I had good time to enjoy so many things in the theater. I had wi-fi, and I took pictures with coming show posts.

I like to share my photos, and remind myself to go out and meet more people.

Deer lake Feb. 15 8:30 AM running around the lake

Feb. 16, 2020

Introduction

It is my first run to join Vancouver Chinese running group on wechat. I like to write a short blog and document my experience.

30 minutes running

We met at 8:15 AM, and then 15 minutes warmup. Since it was raining, we only ran 30 minutes and then met together in the theater to celebrate Valentine's day.

Google Systems Design Interview With An Ex-Googler

Here is the link.

Design a code-deployment system

1. Building code
2. Deploying code

- 5 - 10 regions,
- hundreds of thousands machines
internal system,
- 2 -3 nines
- 30 mins entire deploy
- 1000s deploys/ day
- 10 GB per binary

如果活到80歲 怎樣才能越老越有錢又快樂？『金錢超思考』 | 夯翻鼠看書31

Here is the link.

Jonathon Clements

The 7 BIGGEST Mistakes Made By New Runners | Common Running Mistakes

Here is the link.

Are you new to running in 2020? Not sure where to start? Here are our top 7 biggest mistakes made by new runners. We made the mistakes for you so that hopefully you can avoid them!

How To Start Running When You're Overweight

Here is the link.

Here's how to start running when you're overweight. Losing weight can feel extremely daunting as a task, and as such keeps even the most strong-willed people from getting started. While it may feel too intimidating to walk into a gym without a plan or self-confidence, it's never too early to simply start moving. Coach Holly breaks down her best tips for getting started safely and making it stick. Consider this the start of an awesome journey!

美股投資研究之：股市要崩盤？如何保護好自己的資產？防禦型投資要怎麽做

Here is the link.

Ray Dalio all weather portfolio

T, MO, VZ, TJX, HAS, CHL

Algorithms behind Modern Storage Systems

Here is the link.

美股投資研究之：最有智慧的投資人是誰？關於投資的書，股神巴菲特和首富比爾蓋茨最推崇的是哪一本？

Here is the link.

这个视频主要是关于查理 芒格 (Charlie Munger)的《穷查理宝典》，查理 芒格是巴菲特的合伙人。巴菲特(Warren Buffett)这么评价查理 芒格：查理拓展了我的视野，让我以非同寻常的速度从猩猩进化到人类，没有查理，我会比现在贫穷得多。比尔 盖茨（Bill Gates）也认为，如果没有查理芒格的辅佐，巴菲特恐怕很难做得这么好。

William Ackman: Everything You Need to Know About Finance and Investing in Under an Hour | Big Think

Here is the link.

It is best one hour lesson to take. I like to take more notes later on. The lecturer is a harvard graduate, and a billionaire hedge fund manager.

I also like to take some time to think about how he presents the information. The way he put together the slides, and topics he covers.

I watched the video first time in 2019, at that time, I had not went back to the stock market. I was totally naive and no idea who is the lecturer.


How to evaluate risk?


12:17/ 43:56

Equity:

Comes in man forms:

• Preferred equity
• Common equity
• Options

Only has a residual claim

Can only collect on its claim ...

13:07/ 43:56

Assessing risk

Investment risk:
The probability of the permanent loss of capital


The riskier the business, the higher the rate of return demanded

Government bonds:

1. The lower risk investment
2. Issued as 10, 5, and 3 year debt
3. Earn a 3% return on 10 year debt

25:00/ 43:56

How to be a successful investor?

• Don't invest in startups
• Invest in public companies
• Understand how the company makes money
• Invest at a reasonable price
• Invest in a company that could last forever

What can you own forever? 

For example, 

Coco cola - easy to understand

McDonald's - 50 years - royality

Find a business that: 

• You understand
• Has a record of success
• Makes an attractive profit
• Can grow over time

Businesses that last:

• Sell a product people need
• Sell a unique product
• Elicit brand loyalty consumers are willing to pay for

Keys to successful investing:

1. Invest in public companies
2. Understand how the company makes money
3. Invest at a reasonable price
4. Invest in a company that could last forever
5. Find a company with limited debt
6. Look for high barriers to entry
7. Invest in a company immune to extrinsic factors
8. Invest in the company less reinvestment costs

36:34/ 43:56
How to withstand market volatility:

1. BE financially secure
2. Don't get spooked by short-termed fluctuations
3. Do your own work
4. Invest at a reasonable price

39:59/ 43:56

A good money manager:

1. Can easily explain investment strategy
2. Has a good reputation
3. Has value approach
4. Has a successful track record of at least 5 years
5. Has a consistent approach 
6. Invest own money in the fund

Jack Zenger-Strengths Based Leadership

Here is the link.

Growth Comes From Moments of Being Uncomfortable - Jack Zenger @LEAD Presented By HR.com

Here is the link.

84 years old Jack Zenger gave the talk. I like to spend 20 minutes to watch the video, and spend time to look into my life from 1996 to 2019.

Myth #1

Myth #2 We are the product of our past

Same family friend met with the man's brother to talk about his life.
"My Father was an alcoholic, and I saw what that did the family. I have no other choice but to work hard and be successful."

Myth #3 People do not change


Conclusions

1. Focus on strength
2. Resist playing "victim"
3. Believe in change
4. Make yourself uncomfortable

Growth Comes From Moments of Being Uncomfortable - Jack Zenger @LEAD Presented By HR.com

Here is the link.

John H. “Jack” Zenger is the co-founder and chief executive officer of Zenger Folkman, a professional services firm providing consulting, leadership development programs and implementation software for organizational effectiveness initiatives. Jack is considered a world expert in the field of leadership development, and is a highly respected and sought after speaker, consultant and executive coach. He is the co-author of five books on leadership, Results-Based Leadership, (Harvard Business School Press, 1999) voted by the Society for Human Resource Management (SHRM) as the Best Business Book in the year 2000, the best selling The Extraordinary Leader: Turning Good Managers into Great Leaders (McGraw-Hill, 2002), Handbook for Leaders (McGraw-Hill 2004), The Inspiring Leader: Unlocking the Secrets of How Extraordinary Leaders Motivate (McGraw-Hill 2009) and The Extraordinary Coach: How the Best Leaders Help Others Grow (McGraw-Hill 2010).

9 Habits That Lead to Terrible Decisions

Here is the article.

I like to take some time to read the content and then write down my own notes.

Laziness

This showed up as a failure to check facts, to take the initiative, to confirm assumptions, or to gather additional input.

Basically, such people were perceived to be sloppy in their work and unwilling to put themselves out. They relied on past experience and expected results simply to be an extrapolation of the past.

Not anticipating unexpected events

It is discouraging to consistently consider the possibility of negative events in our lives, and so most people assume the worst will not happen.

Unfortunately, bad things happen fairly often. But many people just get so excited about a decision they are making that they never take the time to do that simple due-diligence.

Indecisiveness

Those paralyzed by fear are the ones who believe that one mistake will ruin their careers and so avoid any risk at all.

Remaining locked in the past

Poor decision makers fail to keep those base assumptions in mind when applying the tried and true. 

Having no strategic alignment

A clear strategy - what is it? Look up google.

Over-dependence

Effective decision makers find a way to act independently when necessary.

Isolation

Networking skills

Lack of technical depth

Failure to communicate the what, where, when, and how associated with decisions

A Historical Look at a 50/50 Portfolio

Here is the article.

My Valentine day

Feb. 15, 2020

Introduction

I am a single person and 53 years old. I used to have problems to plan what to do in holidays and also Valentine day. What should I do in order to build wealth and grow rich in Valentine day?

Valentine day

I spent over 14 years in Florida and then 10 years in Canada. How should I give myself good learning opportunities in life?

I found out that I did not spend time to learn how to invest from 1999 to 2019. Over 20 years being a single, I should have demonstrated good determination to learn something, so people in my community respect me more.

Being frugal

I did big surprise after Chinese new year break, I brought some plant into the office and showed that I am so frugal. So people will trust me that I will not waste time and money, I am working hard to push myself, help business and myself to next level.

6 Tips for Expanding Your Social Circles

Here is the article.

【下班經濟學#73】一堂30萬的美股投資課！那些巴菲特教我的投資招數 ft.林修禾、Peggie

Here is the link.

2019 年美國股市整年上漲 28.9%，第四季更上漲 9.9%，三大指數創下歷史新高，你也想投資美股卻不知道該如何開始？今天邀請到美股投資達人林修禾、Peggie，來跟我們分享怎麼用股神巴菲特的價值投資法，成功邁出投資美股的第一步！

Asset allocation

50% ETF equity
50% on bonds

Diversification, and wait for bear market to invest using those 50% bonds.


25:50 / 28:01
bear market, when the price goes down, you should purchase more. Be disciplined.

How to advice new investor?
26:00/ 28:01
Asset allocation - diversification, diversify different industries
Keep 50% cash, wait bear market, and purchase more

US stock PE - 20, so keep 50% cash

20% - ETF
80% - individual stocks, different industries

Wall Street Week - Full Show (02/07/20)

Here is the link.

Feb.07 -- One of the most iconic brands in financial television returns for today's issues and today's world. Zanny Minton Beddoes, The Economist Editor-in-Chief, Glenn Hubbard, former Council of Economic Advisors Chairman, Daniel Tarullo, former Federal Reserve Board of Governors Member and Lawrence H. Summers, former U.S. Treasury Secretary join host David Westin for a new look at the financial and economic stories that shape our world in "Bloomberg Wall Street Week."

Wall Street Week - Full Show (02/07/20)

Here is the link.

Think you can time the stock market? Look at this chart first

Here is the link.

Learn How to Become Rich

Here is the article.

Realize That More Money Isn't the Answer

More money is not going to solve all your problems. Money is a magnifying glass; it will accelerate and bring to light your true spending habits. If you are not capable of properly budgeting a $25,000 salary, bumping your pay up to six figures won't solve the problem. You may be surprised to learn that many people earning $100,000 a year live from paycheck to paycheck, and they don't understand why it is happening. The problem isn't the size of their checks, it is the spending habits they have built up over the years.

The Best Ways to Become a Millionaire

Here is the article.

How Millionaires Manage Their Money Differently?

Here is the article.

Top 5 Investing Tactics of Millionaires

Here is the article.

3. Pay Close Attention to all Ventures

Dr. Stanley illustrates the point well in The Millionaire Next Door. Millionaires spend an average of five or six hours per week on financial planning (including managing investments) whereas those with a lower net worth tend to spend an hour per week.

Focusing on finances and investments literally pays off. By paying attention to what you're spending, what you are making, and where you keep your financial assets, you can make more optimal decisions and place investments in higher performing asset classes and higher yielding fixed income investments.

4. Take Calculated Risks

Millionaires take risks when the odds are in their favor. A large part of being able to take risks is having the wealth available to put at risk. To a millionaire, a $20,000 or $30,000 loss on an investment gone bad won't send them to the poor house. Consider what those losses would do to a household living paycheck-to-paycheck and you can easily see why millionaires can afford to take such calculated risks.

Millionaires don't limit their investments to only stocks and bonds. Many use capital to start a business or invest in private equity deals that require high initial investments.

How the average American millionaire is managing their money in this market

RIAs spar with Wall Street for Silicon Valley's rich clients

Here is the article.

The U.S. Now Has More Millionaires Than Sweden Has People

Here is the link.

“Some of this slowing in wealth creation has to be expected due in part to softening equity markets, after almost a decade of very strong returns, coupled with the early effects of the tax reform on affluent households,” said Greg Soueid, head of wealth management at advisory firm Treliant. “That said, the growth rate of wealthy households continues to outpace middle-class growth rates.”

The US has more millionaires than Greece has people

Here is the article.

A new study has found that in 2018, there were 11.8 million households in the United States with a net worth of more than $1 million, making up 3 percent of the US population.

Also, 1.3 million well-off Americans were in the ultra-high-net-worth category — defined as having household assets excluding primary-home real estate of between $5 million and $25 million. And some 173,000 households have a net worth above $25 million.

US added 700,000 new millionaires in 2017

Here is the article.

US personal finance Millionaires' new challenge: they're not rich enough for private banking

Here is the article.

How hard it is to train a single person business smart?

Next Recession Will Have A Softer Landing: Paul Hastings' Brady

Here is the link.

World’s Wealthiest Say Equities Will Rally in 2020

Here is the link.

Bloomberg Money Undercover (02/11/2020) - Full Show

Here is the link.

Ariel Investments' Rupal Bhansali: ‘Growth is working, but it's time to switch to value'

Here is the link.

January 28th, 2020, 5:19 PM PST

Wealthy investors are almost unanimously optimistic about markets in 2020, according to UBS Global Wealth Management. A whopping 94% of rich investors expect positive returns this year, according to a survey of more than 4,800 global respondents. About two-thirds are optimistic about their own regional stock markets. On "Bloomberg Money Undercover", Bloomberg's Lisa Abramowicz and Tom Metcalf talk about the poll that was conducted between Dec. 19 and Jan. 12. (Source: Bloomberg)

Upside-down Investing Approach

Here is the link.

6 tips to navigate volatile markets - Fidility.com

Here is the article.

1. Keep perspective: Downturns are normal and typically short
2. Get a plan you can live with – through market ups and downs
3. Focus on time in the market – not trying to time the market
4. Invest consistently, even in bad times
5. Get help to make the most of a down market
6. Consider a hands-off approach

Missing 10 best days in market research

Feb. 14, 2020

Introduction

I spent over 30 minutes to look up all articles related to this topic. I like to write down something important, never time the market again. I did a few times in 2001, in 2009, and then in 2019 May.

Things I learn

I like to write down some good arguments in the following. Will come back.

2015 to 2020 five year celebration - Failure is the best teacher

Feb. 13, 2020

Introduction

I like to write something simple and meaningful. How do I become such a great programmer and also enjoy the life? I think that everything started from an one hour onsite interview from Facebook, in the city of Vancouver, Westin hotel back in 2015. 

Five years memory

I like to take five selfies to memorize those last five years. I was not so smart back in 2015, I tried to push myself to prepare the onsite, I remembered that the event was such great experience, I attended a talk and then asked for onsite interview. And I got one. 

I should become an investor, it is much easy to profit as a long term investor. Instead I chose to have a dream instead,  be one of programmers working for Facebook, my dream. Here is the link with blogs I wrote tagged birth of my coding blog. 

Patient

The interviewer was very patient. I remembered that I could not write code since I did not practice sliding window technique before. I also was so nervous and thought about wasting time of the interviewer and the company. I do believe that Facebook makes the community stronger, help others grow in technical skills. I talked to myself one day I will treat others like this, even though I would be so experienced on problem solving on the interview.

Facebook stock value 5 times more from 2015. I worked full time from 2010 to 2015, I never invested on anything; but I never thought about investing on Facebook. I just thought about myself, how to advance myself technically.

49 years old is still young age, I was 49 years old in 2015. I will treat myself better when I write things about myself.

Corinthians 13:4-7 New International Version (NIV)
4 Love is patient, love is kind. It does not envy, it does not boast, it is not proud. 5 It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. 6 Love does not delight in evil but rejoices with the truth. 7 It always protects, always trusts, always hopes, always perseveres.

2015 

It is a busy year working on Leetcode algorithms. I started my journey to solve 426 algorithms lasting 5 years.

I started to work on my coding blog and also algorithm practice in January 2015. I had hard time to learn by myself, over a year I did not explore Leetcode.com carefully, I did not notice that there is a tab called discuss and there are thousand discuss posts to learn from. If I was a good product manager, or very patient person, I can figure that out in less than a day.

Instead I always used Google.com search, and I always read the blogs shared by Chinese.

2016 

I got the chance to go for Amazon onsite in June 15, 2016. I still remembered the day I worked on preparation.

I had hard time to work on system design, and I did not work on large distributed system study from 2010 to 2016 at all.

My interest was shopping, church activities, tennis sports, weight control, and programming in general.

2017 - 2020

Lovely bear - the art makes working life happy

Feb. 14, 2020

Every one should have some luck in 2020

Feb. 14, 2020

Introduction

I like to write a short research talk about how to reach out to other people. And also I like to write my case study how I apply it to myself.

My communities 

I went to Crystal mall shopping and then I purchased Chinese fortune baboon, and then I put them on my office table.

My ex-roommate left and went back to Victoria island to work. She gave me some used scarf, and I took picture with my own haircut. I hacked a haircut in less than 10 minutes. I took a selfie in the office as well.

I spent less than four Canadian dollars to get the plant in Chinese new year. I wish the best luck for the place I work and things I do in 2020.

I moved to the table near the elevator and also window more than one year ago. I was so happy to move away from the center of the office. I think that it is such great for my plants, better lighting and sunshine!

I cut my own hair again. This time my coworkers told me that it is not even, but it may be a special style.

I made the day special to memorize my ex-roommate. She moved away from Vancouver, and I still remembered how a 31 year old work hard with more than five places, with over $18,000 student loan. Compared to her, I am lucky to have a stable job and with stable income. I never need to worry about pay checks.

leveldb数据库的put ,get ,compaction操作总结

Here is the article. I think that it is definitely a good idea to read some blog written in Chinese.

What Every Programmer has to know about Database Storage by Alex Petrov

Here is the talk I like to spend time to watch. I am not sure if it is the best one to fit my level right now.

Alex Petrov, here is the linkedin.

17:24/ 47:09
Summary

• Immutable
• Write-optimized
• Read multiplexing
• High maintenance costs
• Well-suited for concurrent ops
• Simple to implement

Design large data intensive application - find 10 mentors

Feb. 13, 2020

Introduction

It is so important for me to learn advanced topic about storage design - LSM tree this week. I like to encourage myself to learn better from reading book: Design large data intensive application, so I have to find terms like LSM tree, and then find good talks first. I like to give my ranking from those presenters.

Best talks 

It is so important for me to find mentors through youtube.com, so that I can learn most important content about storage design like LSM tree. I spent over 10 hours to read a book chapter, but I found out that I could not learn by myself, I need to get some help from those mentors.

1. Oana Balmau
2. Niv Dayan
3. Alex Petrov

Here is data structure research Niv Dayan's page.

1. Scaling Write-Intensive Key-Value Stores
2. SILK: Preventing Latency Spikes in Log-Structured Merge Key-Value Stores

3. What Every Programmer has to know about Database Storage by Alex Petrov

Analysts: These Companies Will Be The Most Profitable In 2020

Here is the article.

The 69 tech companies in the S&P 500 together are expected to report net income of nearly $300 billion. That's more profit than any of the 11 S&P 500 sectors. Only stocks in the Financial Select Sector SPDR ETF (XLF) come anywhere close with total expected net income of $273 billion in 2020. No wonder the Technology Select Sector SPDR is up 40% this year, which is more than any other sector.

Prediction: Apple Will Be The S&P 500 Profit Winner

Apple will continue to be the biggest S&P 500 profit machine next year, analysts say. Analysts think the smartphone maker will make $58.1 billion next calendar year, topping Microsoft's $42.9 billion expected profit and Alphabet's $38 billion net income haul during that time.

On an adjusted EPS basis, Apple's profit is seen rising nearly 12% to $13.59 a share in calendar 2020. Hopes for a strong 2020 help explain the powerful 68% jump in Apple's stock this year, even as its earnings per share in the calendar year 2019 are essentially flat. Apple commands a strong 89 IBD Composite Rating, according to IBD Stock Checkup.