## Tuesday, March 31, 2020

### Why The U.S. Probably Won’t Run Out Of Food During Coronavirus

Here is the link.

### More than 200,000 requests for mortgage deferrals sent to Canadian banks in wake of COVID-19 pandemic

Here is the article.

Today, the Canadian Bankers Association revealed that more than 213,000 requests have poured into the six biggest chartered banks.
BNN Bloomberg has reported that this accounts for about 4.5 percent of all of their home mortgages.

### Case study: tips to solve binary search tree shared by the interviewee

The interviewee had super good performance. He solved two algorithms, and one with optimal solution idea. He also shared with me his idea how to write bug free code for search in rotated sorted array. I do believe that he makes good suggestion.

1. Check loop invariant
2. Move the array with one node, two nodes, or three nodes outside while loop, as long as it is working. The good about solution is easy for you to check all edge cases.

### Case study: check completeness of binary tree

Here is the gist.

The interviewee wrote the excellent idea to figure out the completeness of binary tree. His idea is to calculate total nodes in the binary tree first, and then assign each node with a value based on the structure of tree, the root node has value 0, and left child is parent node's value * 2 + 1, right child is parent node's value * 2 + 2. And then if it is a complete binary tree, all nodes value should be in the range of [0, totalNodes - 1]. Apply preorder travesal, and check if node's value is smaller than total nodes.

### Case study: search in rotated sorted array

March 31, 2020

Here is the gist.

### Canada's big banks have already fielded 213,000 requests for mortgage deferrals under coronavirus-relief plan

Here is the link.

### GE Aviation will layoff 10 percent of U.S. workforce, furlough staff in maintenance, repair and overhaul

Here is the link.

### GE Aviation will layoff 10 percent of U.S. workforce, furlough staff in maintenance, repair and overhaul

Here is the link.

### 'Prices are not going to go higher': COVID-19 expected to put chill on spring housing market

Here is the article.

### Here is the article.

Here is the article I like to take some notes.

### THE BOND-MARKET PANIC THAT WASN’T

Here is the article.

### BBB级息差 - one term a time - Second blog

Here is the article I like to take some notes.

Dudley point out in the following:

Fact No. 1
BBB级公司债在美国全部投资级公司债余额中的占比自2008年经济危机以来一路上扬，如今为55%。
BBB rating is dangerous

Case study
BBB级公司债是投资级债券中的最低档，一家公司的信用评级需要至少两家评级机构均作出降级决定后才会被降至高收益债级别，也就是BB+或以下的级别，这种情况一旦发生，专门投资某类债券指数的投资者会由于投资范围无法覆盖垃圾债而被迫抛掉被降级的公司债。如果某一只债券只有两家评级机构给予评级，但只有一家机构建议降级至垃圾债级别，那么某些限制条款的存在可能也会导致被迫清仓情况的发生。”

March 31, 2020

### Introduction

I like to get to know how yahoo finance webpage with this matching stocks search results, how good it is to show sorting info using ^ or downward icons. I also like to look into what stocks go up today, and ask myself why.

### March 31 2020 biggest winner

Matching Stocks1-25 of 246 results
Share
Results were generated a few mins ago. Pricing data is updated frequently. Currency in USD
Symbol
NamePrice (Intraday)Change% ChangeVolumeAvg Vol (3 month)Market CapPE Ratio (TTM)52 Week Range
CNQ
Canadian Natural Resources Limited13.55+2.42+21.74%23.661M4.492M16.086B5.87
PE
Parsley Energy, Inc.5.73+0.92+19.13%14.799M9.066M2.365B9.14
CVE
Cenovus Energy Inc.2.0200+0.3100+18.13%15.403M7.095M2.49BN/A
SU
Suncor Energy Inc.15.80+2.38+17.73%24.477M6.831M24.288B6.97
CX
CEMEX, S.A.B. de C.V.2.1200+0.2900+15.85%21.557M10.359M3.203B23.56
MPLX
MPLX LP11.62+1.56+15.51%7.651M5.174M12.299B11.62
NBL
Noble Energy, Inc.6.04+0.73+13.75%13.366M10.146M2.93BN/A
FANG
Diamondback Energy, Inc.26.20+2.61+11.06%5.473M3.797M4.147B17.85
TECK
Teck Resources Limited7.56+0.65+9.41%5.711M5.761M4.194B1.69
OKE
ONEOK, Inc.21.81+1.77+8.83%10.262M4.868M9.014B7.10
DVN
Devon Energy Corporation6.91+0.56+8.82%14.573M9.508M2.646BN/A
MOS
The Mosaic Company10.82+0.82+8.20%7.689M6.277M4.098BN/A
FCX
Freeport-McMoRan Inc.6.75+0.51+8.17%34.016M30.294M9.794BN/A
RCL
Royal Caribbean Cruises Ltd.32.17+2.40+8.06%25.993M9.678M6.724B3.59

March 31, 2020

### Introduction

It is not too difficult for me to find biggest winner stocks today and also biggest loser stocks today. I like to get more ideas about individual stocks, and then think about what to do in my research on stock market.

### March 31 loser lead board

type "Loser stock today"

Matching Stocks1-25 of 599 results
Share
Results were generated a few mins ago. Pricing data is updated frequently. Currency in USD
Symbol
NamePrice (Intraday)Change% ChangeVolumeAvg Vol (3 month)Market CapPE Ratio (TTM)52 Week Range
NRZ
New Residential Investment Corp.5.01-0.96-16.08%28.879M8.727M2.082B3.74
CIOXY
Cielo S.A.0.7948-0.1452-15.45%370,191382,1352.135B2.24
KLPEF
Klepierre SA19.47-3.43-14.98%27,9413,6694.897B3.96
ERIE
Erie Indemnity Company148.24-26.10-14.97%135,560125,1146.847B24.47
HYPMY
Hypera S.A.5.07-0.72-12.40%22,96017,6753.324B9.75
RETA
Reata Pharmaceuticals, Inc.144.34-17.54-10.84%933,481410,5794.796BN/A
NLY
Annaly Capital Management, Inc.5.07-0.60-10.58%31.695M19.015M7.252BN/A
CHNG
Change Healthcare Inc.9.99-1.13-10.16%4.853M8.213M3.031BN/A
AGO
Assured Guaranty Ltd.25.79-2.85-9.95%872,652767,6482.38B6.45
DXC
DXC Technology Company13.05-1.39-9.63%7.199M5.123M3.311BN/A