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July 26, 2021, 12:11 p.m. EDT · CORRECTED

Why stock-trading apps like Robinhood plus social media are a potent brew for investors

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By Mark Hulbert

An earlier version of this story erroneously indicated that the Robinhood app includes leaderboards and competitions.

Just in time for Robinhood Market’s /zigman2/quotes/228268942/composite HOOD +0.31% initial public offering, reportedly slated for July 29, comes a study shedding light not only why Robinhood is so popular with younger investors but also the often-toxic interaction of social media and investment behavior.

The study, in the August issue of the Journal of Economic Behavior & Organization , is entitled “ Increased Risk Taking, Not Loss Tolerance, Drives Adolescents’ Propensity to Gamble More Under Peer Observation .” Its authors are Agnieszka Tymula, an economics professor at the University of Sydney, and Xueting Wang, a Ph.D. candidate in behavioral economics at that institution.

The researchers created elaborate experiments in which 18- to 24-year-olds were given the choice between a safe monetary outcome and a lottery win. In some experiments they made their choices while alone, and in others while being observed by their peers. They were far more likely to choose the risky lottery when being watched.

Though the study does not focus on Robinhood in particular, it helps to explain some of the riskier behaviors that have been associated with the online trading app. A spectacular example is the short-squeezes that Robinhood investors played a big part in helping to engineer earlier this year in stocks such as AMC Entertainment Holdings /zigman2/quotes/200235402/composite AMC +0.20% and GameStop /zigman2/quotes/203755179/composite GME -1.22% .

Users would boast on social media about their profits, exploits and the thrill of “sticking it” to hedge funds and short-sellers generally, reminding each other that “you only live once” (YOLO). The term “HODL” became popular, referring to a commitment to buy and hold regardless of volatility along the way. That term traces ( according to Investopedia ) to “a drunk, semi-coherent, typo-laden rant” on social media from an “investor with poor trading skills but a determination to simply hold.”

Tymula speculates, based on her research, that investors such as these may have been “motivated to take greater risks in each other’s (online) company.”

Of course, Robinhood users are not the only ones involved in stocks’ short-squeezes, or in the meme stock movement generally. And young adults were heavy users of social media before Robinhood was created. So lots of factors contributed to the potent combination that this new study’s authors document.

But I submit that Robinhood is at least an unindicted co-conspirator. Social media and social interaction are a big part of why Robinhood is so popular. Many users of the Robinhood app seem to view investing as a game. They often post screenshots of their profits on social media.

In response to a request for comment, a Robinhood spokesperson e-mailed: “We are proud that the new generation of investors, who were sidelined for decades from participating in one of the biggest engines for economic growth, now have access to help grow their wealth and participate in the markets. We built Robinhood to give everyone the tools and education to make decisions about their own financial futures.”

It’s worth emphasizing that young adults’ increased risk-taking in the presence of peers is hardly confined to stock trading. So it would be surprising if young adults did not engage in risker investment behavior when being watched.

The investment implication for all of us is to avoid risky investments pursued because of the social thrill of undertaking that risk. That requires some honest self-reflection, since this behavior is mostly, if not completely, unconscious.

The alternative is to let your portfolio possibly become too risky. Hyper-risky portfolios are never a good idea at any time, but they would be among the biggest losers in the event that the current stock market is a bubble about to pop.

Mark Hulbert is a regular contributor to MarketWatch. His Hulbert Ratings tracks investment newsletters that pay a flat fee to be audited. He can be reached at

Also read: The Robinhood IPO is coming, but steer clear

Plus: The price-to-earnings ratio is flawed as a stock market indicator. This is how to make it more accurate

US : U.S.: Nasdaq
$ 41.83
+0.13 +0.31%
Volume: 4.06M
Oct. 20, 2021 4:00p
P/E Ratio
Dividend Yield
Market Cap
$35.67 billion
Rev. per Employee
$ 40.88
+0.08 +0.20%
Volume: 31.22M
Oct. 20, 2021 4:00p
P/E Ratio
Dividend Yield
Market Cap
$20.94 billion
Rev. per Employee
$ 184.52
-2.27 -1.22%
Volume: 2.28M
Oct. 20, 2021 4:00p
P/E Ratio
Dividend Yield
Market Cap
$14.29 billion
Rev. per Employee

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Mark Hulbert is editor of the Hulbert Financial Digest, which since 1980 has been tracking the performance of hundreds of investment advisors. The HFD...

Mark Hulbert is editor of the Hulbert Financial Digest, which since 1980 has been tracking the performance of hundreds of investment advisors. The HFD became a service of MarketWatch in April 2002. In addition to being a Senior Columnist for MarketWatch, Hulbert writes a monthly column for Barron’s.com and a column on investment strategies for the Journal of the American Association of Individual Investors. A frequent guest on television and radio shows, you may have seen Hulbert on CNBC, Wall Street Week, or ABC’s World News This Morning. Most recently, Dow Jones and MarketWatch launched a new weekly newsletter based on Hulbert's research, entitled Hulbert on Markets: What’s Working Now.

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