Monday, July 21, 2025

交易员导师布雷特·斯坦伯格:成功的期货股票交易员最喜欢的三种止损策略

交易员导师布雷特·斯坦伯格:成功的期货股票交易员最喜欢的三种止损策略


导读:
要想成为一名成功交易员,仅靠交易策略是不够的。几乎所有资深交易员也都承认,交易心理对他们的交易会产生重要影响。
布雷特·斯坦伯格(Brett Steenbarger)是美国知名交易心理导师,曾在华尔街多家顶级培训机构担任交易员心理导师。作为一名心理学教授和资深交易员,布雷特对交易心理的理解远胜他人。
今天与大家分享斯坦伯格的三种止损策略
我最近经常听到的问题是如何设置止损。具体来说,交易员们对我如何设置止损很感兴趣,尤其是那些平均持仓时间不到30分钟的交易。我认为,成功交易的关键是学会如何接受亏损。我们知道,市场虽然不是完全有效的,但在很大程度上是有效的;大众交易员永远无法获得完全的可预测性。这使得交易有点像打棒球,在棒球中,即使经常出局,也可以获得高度的专业技能。
失败的交易员往往是完美主义者。他们把一个好的交易日等同于一个盈利的交易日。大错特错!一个好的交易日应该是你按照自己精心研究的计划严格执行的日子。随着时间的推移,好的交易日将就会带来利润。但市场终究是存在不确定性,这就意味着,即使是最周密的交易计划也可能出错。在短期内,你无法控制你的盈利能力。但如果你对自己的策略做了充分的研究,就能够更好地控制自己的交易日的表现,更多好的交易日将由此而来,并且在长期内产生利润。
完美主义交易者把亏损等同于失败。因此,亏损会引发一系列负面的内部反馈,以及随后在失望之下进行更多的交易。而现实的交易员会则明白,市场存在一定程度的不确定性,亏损是交易成本的一部分。我们的目标是尽可能的降低损失,而不是徒劳无功的让它们消失或纠结其中,被其困扰。
通过自己的交易经验累积和与数千名交易员学员的对话,我总结了以下三种最为有效的止损理念:基于价格的止损策略、基于时间的止损策略和基于指标的止损策略。它们都可以被提前演练,让损失最小化。
基于价格止损
大多数交易者都熟悉基于价格的止损策略(尽管不是所有人都遵守它们!),当时间和指标无法让我退出交易时,我就会把基于价格的止损作为最后的手段。
我把每一笔交易都看作是一种假设,如果我在一分钟图上做多标普指数时,那是因为我将此前的一个低点视为了一个潜在的低点。或许我已经注意到,道琼斯指数和纽约证交所的综合股价指数的点值已跌至显著的负值,但仍高于此前的低点。在这样的情况下,我在建仓的同时就会以前期低点为止损。此时我假设前低为一个重要的点位,也是此次上涨过程中的第一次回踩。如果价格回到之前的低点,那我的假设会被证伪,此时,我需要收回剩余的资金,止损离场。
做出这种基于价格的止损操作的一个关键是将你的止损点设置在你假设的高点或低点附近,这样即便你的假设被证伪,损失也不会太大。在短线交易中,这意味着我要检查一分钟和五分钟图,以及考虑做市商的报价进行买卖。

基于时间止损
第二种止损方法是利用时间。我设计的一个交易系统的持仓时间为21分钟,以便捕捉3个标准普尔指数点的利润。如果期望的利润没有在21分钟内达到,我就会立即退出交易 - 即使当时的价格没有达到我设置的止损价格。
这种基于时间的止损策略的逻辑如下:当价格动能按着我期待的方向上升时,我就做一次短线交易。如果我对价格方向的判断是正确的,那么我应该会很快就能止盈。相反,如果在我做多之后,价格仍不上涨,甚至是出现了轻微下跌的情况,那么就说明我对价格方向的解读是错误的。此时我的假设也就被证伪。我从惨痛的经验中认识到,当一笔交易“保持平稳”时,我对走势的判断很可能是正确的,但平稳的走势就是我所能把握的全部方向。这意味着市场下一步很可能会触及我的止损点。基于时间的止损让我可以暂停交易而不是在损失一两个点后,方才收手。
交易中为数不多的严格法则之一是,每笔交易的风险和回报与持有期成正比。在设计你的交易方法时,我鼓励大家将持有期考虑在内,以使你的方法适合你的个性和风险承受能力。我在研究了标普500指数在不同时间段内3+点利润的最佳预测指标后,设计了属于自己的21分钟交易系统。而在整个研究中,我考虑和衡量了数几十个指标 - 波动性、动量、成交量、盘中上涨/下跌、各种各样的报价数字、行业指数、盘中新高/新低、股指期货溢价、盘中看跌/看涨数据、盘中TRIN等 - 方才得出了一些经过良好测试、与独立数据相符的结论。一旦系统建立起来,基于时间的止损就已经建立起来,它将与我的价格止损策略形成互补。

基于指标止损
第三种止损方法则是基于指标的止损。如上所述,我在交易中使用的许多预测指标都是股票市场中的盘中指数,比如上涨/下跌、新高/新低和成交量。我花了很多时间测试这些指标与预期价格走势之间的关系,因为这些指标之间以及指标与价格之间的关系总是在变化。例如,我今天在21分钟系统中使用的指标组合在明年可能会,也可能不会继续使用。我的目标是找出市场上有用东西,然后继续做下去,直到它们退化为止。
建立这种策略的大部分时间都在回答这样一个问题:当这些候选指标达到极值时会发生什么现象?是价格的持续,还是价格的反转?这些信息能够极大的改善我们的止损策略。
例如,我的一个交易框架使用了平均两小时的持有期。纽交所综合股价TICK指数是这种方法的一个重要预测指标。我最近研究了TICK在超过两小时范围时会发生什么。有趣的是,当该TICK指数大幅突破其区间时,大盘在接下来的几个小时内平均上涨了0.20%。当该TICK指数大幅跌破其区间时,大盘则会进一步下跌- 0.11%。(这相当于平均上涨2个SP点和下跌1个SP点)。经过测试后我发现,当价格出现下行突破后,有148次上涨和184次下跌;而当价格出现上行突破后,有205次上涨和121次下跌。
基于这样的研究,我创建了一个基于指标的止损。如果TICK突破新高或跌至新低(如果在其新高时,我在做空;或新低时,我在做多),那么我就会退出交易 - 即便此时的价格尚未达到我设置的止损价位。如果大家花时间研究不同时段的盘中指标,也可以创建出属于自己的基于指标的止损点,以适应你的交易风格和方法。
使用止损作为心理工具
在止损设定好后,大家就可以在交易过程中进行心理演练,以确保其得到良好地执行。一笔“好”的损失应该是在计划内的损失;唯一在市场中的失败是那些始料未及的失败。
我阅读过许多交易导师的著作:琳达?拉斯克(Linda Raschke)、肯?沃尔夫(Ken Wolff)、马克?库克(Mark Cook)、阿里?基辅(Ari基辅)、亚历山大?埃尔德(Alexander Elder)、马克?道格拉斯(Mark Douglas),以及杰克?施韦格(Jack Schwager)的《奇妙的市场奇才》(wonderful Market wizard)。书中所有成功的交易者和教练都强调纪律是模范交易的核心。当你在设置、规划和执行止损时,其实就是在建立纪律,并利用你的失败来强化成功所需要的品质。而具有讽刺意味的是,成功的交易员会规划“失败”;不成功的交易员却对“失败”不屑一顾。
布雷特·斯坦伯格(Brett N. Steenbarger),博士,纽约锡拉丘兹SUNY Upstate医科大学精神病学和行为科学临床教授,《交易心理学》(Wiley, 2003)一书作者。作为芝加哥Kingstree Trading, LLC的交易员发展总监,他指导了许多专业交易员,并协调了一项针对交易员的培训项目。Brett是股票、指数、外汇的活跃交易者,他利用基于统计的模式识别进行日内交易。

10 Best Books on Trading Psychology

In the world of online trading, success does not just depend on market knowledge or technical analysis, but significantly on the trader's psychological resilience and mindset.

The following article explores a curated list of influential books that delve into the mental and emotional aspects of trading. These works, authored by esteemed experts in psychology and trading, offer invaluable insights into managing emotions, developing discipline, and understanding the psychological factors that influence trading decisions.

Whether you're a seasoned trader or just starting out, these books provide essential strategies for cultivating a mindset that can weather the volatility of the markets and enhance decision-making skills, ultimately leading to sustained success in your trading endeavors.

 

#1 Best Loser Wins – Tom Hougaard

BestLoserWins'Best Loser Wins' by Tom Hougaard presents a counterintuitive yet profound approach to trading, emphasizing the skill of managing losses effectively. Most traders exclusively focus on winning, but this book shifts the paradigm to understanding and embracing losses as a path to success. Readers will learn the psychological resilience required to deal with losses, strategies to minimize them, and the importance of a clear mindset in trading. Hougaard's insights help traders develop a healthier relationship with losses, improving their decision-making process and overall trading performance.

 

#2 Market Mind Games – Denise Shull

MarketMindGamesDenise Shull's 'Market Mind Games' delves into the psychological complexities of trading. It offers a neuropsychological perspective, helping traders understand the emotional and cognitive processes influencing their trading decisions. Readers gain insights into managing emotions, understanding market psychology, and making more informed decisions under pressure. This book is essential for traders looking to align their psychological state with their trading strategy, leading to more consistent and rational decision-making.

 

#3 The Daily Trading Coach - Dr. Brett Steenbarger

TheDailyTradingCoachIn 'The Daily Trading Coach', Dr. Brett Steenbarger provides traders with practical strategies for self-improvement. The book is structured as a series of lessons that guide traders in refining their approaches daily. It covers topics such as coping with stress, developing self-discipline, and learning from mistakes. Traders will learn to become their own coaches, enabling continuous personal and professional development essential for sustained success in the market.

 

#4 The Psychology of Money – Morgan Housel

PsychologyofMoneyMorgan Housel's 'The Psychology of Money' offers insightful narratives about how people think about money and the peculiar ways they behave with it. Traders will benefit from understanding the psychological factors driving decisions when money is on the line. The book covers a broad range of topics, from risk management to the influence of ego in financial decisions, making it a vital read for anyone looking to develop a more thoughtful and disciplined approach to trading.

 

#5 Radical Renewal – Dr. Brett Steenbarger

'Radical Renewal' by Dr. Brett Steenbarger addresses the psychological challenges traders face and provides tools for profound personal transformation. The book combines insights from psychology with practical trading applications. Traders will learn about the importance of mental health, adaptability, and the development of a growth mindset in achieving long-term success in trading.

The great thing about this book is that Dr. Steenbarger published this book as a series of freely accessible blog posts: Read Radical Renewal

 

#6 Trading in the Zone - Mark Douglas

TradingInTheZoneMark Douglas' 'Trading in the Zone' is a seminal work that addresses the mental state required to achieve consistent trading success. It teaches traders to think in probabilities, manage risks, and understand the psychological pitfalls that can impede decision-making. This book is crucial for traders aiming to develop a mindset that is free from emotional interference, enhancing their ability to make decisions based on market realities rather than personal biases.

 

#7 Trading for a Living – Dr. Alexander Elder

TradingForaLiving'Trading for a Living' by Dr. Alexander Elder covers the essential aspects of trading psychology, risk management, and technical analysis. It offers a comprehensive guide for traders to develop disciplined trading habits, understand market dynamics, and manage their emotions. This book is particularly valuable for traders seeking to establish a solid foundation in their trading career, combining psychological strategies with practical trading techniques.

 

#8 The Disciplined Trader – Mark Douglas

DisciplinedTraderIn 'The Disciplined Trader', Mark Douglas explores the psychological challenges traders face and offers strategies to overcome them. The book emphasizes the importance of discipline, mental clarity, and emotional control in successful trading. It guides traders in developing a structured approach to the market, helping them avoid common psychological traps and make more rational trading decisions.

 

#9 Atomic Habits – James Clear

AtomicHabitsJames Clear's 'Atomic Habits' is not specifically about trading but offers invaluable insights into habit formation and improvement. Traders can apply these principles to develop consistent and effective trading routines, enhance discipline, and cultivate positive trading habits. This book is essential for traders looking to make incremental improvements that compound over time, leading to significant growth in their trading skills and strategies.

 

#10 The Mental Game of Trading – Jared Tendler

MentalGameofTradingJared Tendler's 'The Mental Game of Trading' provides a comprehensive guide to mastering the psychological aspects of trading. It addresses common mental pitfalls traders encounter, such as fear, greed, and overconfidence. Readers will learn practical techniques for enhancing mental toughness, improving focus, and maintaining emotional equilibrium under pressure. This book is crucial for traders aiming to build a robust psychological framework, essential for navigating the volatile world of trading.

 

How to think like a hedge fund manager

 

How to think like a hedge fund manager

Prior to managing individual people’s money, I worked as a risk manager at the world’s largest publicly traded hedge fund. We ran a multi-manager pooled investment vehicle that invests into hedge funds as its core strategy. Asset allocation on steroids, with strategies ranging from long-short equity, to global macro, to arbitrage strategies on mergers, convertible bonds, and volatility. My role as a risk manager was to interview some of the most brilliant minds and powerful people in the investment world. Some hedge fund managers were quiet math nerds, while others were as boisterous as the characters on Billions.  Regardless of who was in the seat across from me, my job was to understand what they did, and write a report that contained my opinion of whether this hedge fund was suitable for investment. In risk management, my job was two fold: to protect our clients from frauds, and to protect our client’s capital from unforeseen losses. While today I believe that successful investing doesn’t necessarily need to be as complicated as a hedge fund, the core lessons I learned in my former role do shape the way I think about investing today. I’d like to share those with you in this blog, and a few hedge fund stories along the way. 

Lesson number 1: Know your counterparty. Understand where your money is being held.

This one sounds so obvious, and yet time and time again I see a lack of due diligence in this area. Hedge funds often engage with a multitude of financial counterparties to invest, obtain leverage, or lend for a return. It’s reasonable to work with a number of counterparties to get the best offerings available (think, shopping interest rates), but when proper due diligence isn’t performed, it can be painful. Understanding investment risk is one thing, but cash should be safe. What could go wrong? Lehman Brothers. In this classic example, we saw that many hedge funds who had cash held at Lehman during 2008 were still cleaning up the mess 10 years later, having lost a great deal of capital on what was supposed to be their safest investment, cash. 

When cash is held in a bank account, up to $250k should be covered by FDIC insurance, which means that the US Government will provide protection over your cash in the case that the bank goes bankrupt. In an investment account, if your account is held with a SIPC member firm, you have similar protections through SIPC. These institutions are reliable, and further due diligence isn’t necessarily required if you have under $250k for cash or investments you manage. However, when your balance exceeds that amount, or when you hand over the reins to a third party, knowing where your cash is held is important. 

Where could this matter for you? 

  • If you have over $250k in an account, check the credit worthiness of the bank. If you don’t know how to do that, and you need to keep more than $250k in cash, it’s OK to spread your cash across multiple institutions to gain FDIC protection. 

  • Working with a financial advisor. Your financial advisor should be granted limited power of attorney over your investments, which will allow them to invest on your behalf and charge a management fee. However, your financial advisor should be custodying your assets with a qualified custodian. This setup provides you, the investment account owner, with control of how cash is moved in and out of your account. Schwab, TD Ameritrade, Fidelity, and Pershing are all examples of qualified custodians. 

  • Investing in cryptocurrency is complicated in general, but how cryptocurrency is safely held is an ongoing debate. We’ll point to one of our favorite financial planning gurus, Derek Tharp,  Lead Researcher at Kitces.com, for his take on this. As you can see from this article, it’s not so straightforward! And frankly, is why I have yet to invest. 

  • Investing in private companies. You should understand where your cash is being stored, what it can be used for, who has the authority to use it, and if it can be pledged for debt. 

Lesson number 2: Don’t put all your eggs in one basket. 

This one was relevant in 2000, it was relevant in 2010, and it’s relevant today. Concentration blows you up. Tiger Global Management is notorious in the hedge fund world. Obtaining training from Tiger is a badge of honor, it’s like going to an Ivy League college for stock picking portfolio management, so much so that anyone who comes out of there is referred to as a Tiger Cub. They are notorious, because they take big swings, and sometimes they hit it out of the park. But when it goes wrong, it goes really wrong. Here is the most recent instance, where the FT reports that Tiger blames inflation after a 50% drop in flagship hedge fund. But this isn't the first time! Back in 2000, the Washington Post reported that Tiger Funds was closing, blaming the irrational market. 

We used to watch 13F filings* to evaluate our exposure to Tiger (the original & the cubs) concentrated holdings. (*Anyone investing over $100 million has to report to the SEC via a 13F filing what stocks they own, and this is publicly reported).  Because so many of these portfolio managers came from the same training grounds, we would see a lot of added risk once they piled into certain positions. They did well as they were piling in, but as they started to unwind, there would be huge downward pressure, and we didn’t want that exposure or risk! 

This is highly relevant for our client base, many of whom have concentrated stock positions. It’s great when it’s going well and you’re getting richer in two ways: stock is going up, and you’re probably getting a raise! However, the downside is painful. We’d prefer that none of our clients invest in their own company stock, but if they do, we always recommend setting a cap on how much exposure to have in that stock versus their investable assets / net worth, and sticking to it!  More often than not, you don’t need to take huge concentrated risks to set yourself up for life. 

Lesson number 3: You don’t have to be right 100% of the time, you just have to be right more than you’re wrong, and win more when you’re right than you lose when you’re wrong. The combination of those two forces can make you very rich.  

There’s a hedge fund strategy called statistical arbitrage that exemplifies this concept. The primary execution of the strategy is to go long stocks with leverage, and short stocks with leverage in the same amount, while eliminating all possible market risk. This meant that on $1 million of investments, they could go long on $5 million of stocks (betting that the price of these stocks would go up and $5 million short of stocks (betting that the price of these stocks would go down). However, it would be very nuanced, where there would be equally long and short country exposure, sector exposure, industry exposure, factor exposure, and the list goes on and on and on. These funds are often run by a combination of computer scientists and PhDs who are responsible for analyzing and extrapolating big data into trends. To juxtapose the variety of how analysis was done:

  • Fund 1 used software to translate and analyze small local newspapers across Asia to evaluate how companies were spoken about, to determine if they should bet on or against a company. 

  • Fund 2 used beacons to track customers shopping at Target, and then essentially used this beacon to monitor individuals’ online behavior and determine whether they were more of a Craigslist or Restoration Hardware shopper. Based on this categorization, the model would then decide if they should be for or against a given stock. Hearing this for the first time blew…my…mind. 

These funds took big bets from an overall exposure perspective, but actually on an individual risk perspective, each bet was very small (we’re talking less than 0.3% of a portfolio). Their main goal was to win more times than they lost, and win more when they won, than lose when they lost. By doing so, they locked in extremely high returns. The best of this sort is Renaissance Technologies, who from 1988 to 2020 is reported to have earned 66% returns per year on average. 

Simplifying this to what you can do: be a long term investor in the stock market. Jeremy Schwartz and Jeremy Siegel of WisdomTree share research in the book Stocks from the Long Run about how the S&P 500 performed over various time horizons. Some stats:

  • If your holding period is over 10 years, since 1802, stocks have outperformed T-Bills 75% of the time. Even on a 1 year basis, stocks outperformed T-Bills 63.2% of the time. 

  • Similarly, reviewing all 10 year periods since 1802, the best stock performance was +16.8% per year, and the worst was -4.0%. The upside/downside profile is more extreme, but still favors the upside on a 1 year basis. The best year for stocks was +66.6% and the worst year was -38.6%. 

Lesson number 4: Don’t confuse marketed time horizon for actual time horizon. Only buy illiquid investments with money you don’t need at a specific time. Being a forced seller is painful. 

Back in 2012, a large European bank was aiming to bring hedge funds to the masses. However, to compete in the individual investing space, the bank wanted to provide investors with terms similar to mutual funds. This meant that you could buy and sell these funds on a daily basis, and receive daily pricing. This was a huge hurdle for the hedge fund world to overcome, and really opened the doors to a new audience for hedge fund investments. In performing due diligence, our team noticed something. The returns of the hedge funds these funds were meant to track didn’t look at all like the returns of the hedge funds themselves. Why? Because of liquidity. 

In the most extreme example, a fund was created to track a large high yield credit hedge fund, but offered daily liquidity. This hedge fund would buy companies out of bankruptcy, and make their money by restructuring the businesses they bought. Their bread and butter was their ability to rebuild a business that no one else could wrap their heads around, through creating complex securities and selling pieces of the business off over time. The fund that was meant to track this hedge fund was having individuals come in and out of the fund on a daily basis. Anytime someone would leave, the hedge fund would be forced to sell these companies shortly after buying them, ahead of any of the good work being done. Since they were the only ones that saw value in the company, knowing what they could do to repair it, no other buyers were available. The price of the security went down, and then more investors wanted out. This sent the “liquid” fund into a tailspin, which resulted in a 50% difference in what investors in the daily liquidity fund received, versus those that locked up their money to see the investment through to the end. Just because daily liquidity was offered, doesn’t mean it was the best for the investment strategy. 

Where I see this most today is related to private equity or real estate investments. Oftentimes investors are pitched on a two-year turnaround on a project, but the reality is that sometimes for an investment to see its potential, longer is needed. You don’t want to be a forced seller, and not get to see the investment through to its purpose. It’s OK to take illiquidity risk, but take it with funds where you really don’t have a timeline. 

Lesson number 5: Expect the unexpected. 

One of my core responsibilities in managing a portfolio of hedge funds was to determine worst case scenarios. This is obviously not an easy feat, because anything could happen. How we approached this was to think about it from an individual risk perspective; what would happen if stocks lost 10%, if credit spreads widened 100 basis points, if interest rates rose 1%, if the US Dollar dropped by 5% versus other currencies, or if volatility spiked by 20%. On a monthly basis, we would review all 100 hedge funds we invested in to determine how each of them stacked up so these risk factors. Then, we’d think about historic events and how these risk factors compounded, and then we’d round up! Even if it felt unlikely, or even impossible, we posed the question of what would happen to our investments if this were the case. This gave us great comfort over how to size our investments, and if our overall investment return was commensurate with the risk we were willing to take. 

Just because you don’t have a crystal ball, knowing and understanding how your investments behave in a variety of markets is important analysis. This can help inform you if you’re taking too much risk in your investments, or if you have too many eggs in one basket. Ultimately your goal as you build your net worth should be diversification, finding investments that will zig while your other investments zag.  

Summing it up

Although today, my investing is a lot less complex than it once was, my time spent in the hedge fund world built the foundation for Mana’s investment philosophy. There are so many ways to make money, but when undue risks are taken, it can easily be lost. Our goal for our readers and Mana clients is to help provide safeguards to maximize their wealth. We hope the stories we shared provide you with some insight on how to think about investments like a risk manager or a hedge fund manager would. Remember: know where your cash is parked, investment sizing matters, be patient, and don’t forget to consider what happens if you’re wrong. Humility is a wonderful quality in this business.

Trading Mindset: No More Luck | How to Think Like a Pro Trader (Full Audiobook)

 

Open stock | Opendoor Is the Market’s Latest Meme Stock. Proceed Carefully.

Opendoor Is the Market’s Latest Meme Stock. Proceed Carefully.

Story by Martin Baccardax
 • 1h • 
3 min read

 

Opendoor Technologies is emerging as the market’s latest so-called meme stock, a term used to describe GameStop and AMC Entertainment during the explosion of retail investor trading four years ago.

Shares of the San Francisco-based tech group that focuses on the stagnant real estate sector have nearly tripled in value over the past week. An influential investor’s discussion of the company on social media appears to have triggered retail interest.

There’s a reason that sounds familiar. GameStop, patient zero in the meme stock craze that began in January 2021, was a struggling stock with a dying business model and a string of quarterly losses. An investor who used the moniker Roaring Kitty and was later identified as former MassMutual advisor Keith Gill, advanced a bull case for GameStop stock on Reddit’s WallStreetBets community that ultimately lifted the retail company’s market value from around $1.2 billion to a peak of $22.7 billion in less than a month.

Profits for GameStop have been few and far between since. CEO Ryan Cohen has steered the company in several different directions since taking the helm in 2023. GameStop’s market value is still north of $10 billion.

However, Opendoor may struggle to capture that sort of investor zeitgeist, even as its market value approaches $3.2 billion for the first time in more than a year following an endorsement from activist investor Eric Jackson, founder of EMJ Capital, over the past week on X.

Opendoor has been in steady decline ever since hitting a peak valuation of $20.6 billion in February 2021, shortly after its merger with the special purpose acquisition company Social Capital Hedosophia Holdings Corp II, led by Chamath Palihapitiya.

That isn’t really a surprise, given Opendoor’s focus on what’s called the instant buyer market for home sellers, designed to speed up transactions and avoid realtor brokerage fees.

Existing-home sales have fallen by nearly 50% since the group went public in late 2020, and were last estimated by the National Association of Realtors at an annual rate of 4.03 million in May, the lowest since 2009.

High mortgage rates that discourage buyers are also locking sellers into their current homes. A Bankrate survey published last week showed more than half of U.S. homeowners wouldn’t feel comfortable either buying or selling a new home, based on prevailing 30-year rates, which the Mortgage Bankers’ Association pegs at 6.82%.

Executives at Opendoor weren’t immediately available for comment when contacted by Barron’s earlier Monday. The stock was 75% higher on Monday at $4.47, the highest since December 2023, with more than 1 billion shares changing hands.

Other investors are lining up to bet against Opendoor’s recent surge.

Short sellers bet against a company by borrowing shares and selling them. If the price of the stock declines, the short sellers will buy back the shares at a lower price, return the borrowed stock (while paying a fee), and pocket the difference.

Wall Street pros argue that short sellers can help establish more accurate pricing and liquidity in stock markets. Critics say they can damage companies and wipe out small investors.

Data from S3 Partners, which tracks short selling across all the major U.S. indexes, suggest that bets against Opendoor have risen to around 24% of Opendoor’s shares outstanding. Short interest on a stock such as Apple, by comparison, is around 0.75% of its shares outstanding.

Another factor, tied in part to elevated short interest in a particular stock, is the impact of a “gamma squeeze.” A gamma squeeze differs from a short squeeze in that it is focused on the options markets. A traditional short squeeze occurs when stock lenders are forced to buy back shares that are moving quickly higher.

In a gamma squeeze, investors will often move to options markets to take advantage of a stock’s sudden change in momentum.

Opendoor options are seeing a big uptick in buyers of call options, which give an investor the right, but not the obligation, to own shares at a certain price at some fixed point in the future.

Call option sellers, to hedge their risk while meeting market demand, will often buy shares of the underlying option at the same time. This can create a cycle of increased share prices that unwinds once the options expire.

Write to Martin Baccardax at martin.baccardax@barrons.com

Friday, July 18, 2025