E19: Robinhood's GameStop decision: Why did it happen and how can it be prevented in the future?

GameStop’s squeeze began as a genuine value thesis before becoming a mass momentum trade. DeepFuckingValue put $50,000 into long-dated calls in 2019, Michael Burry disclosed a 3% stake, Ryan Cohen later bought nearly 10%, and WallStreetBets identified short interest above 120%.

By January 2021, the trade was no longer simply retail versus Wall Street. Short interest reached about 140%, retail piled into calls, quant and momentum funds joined the long side, more than $100 billion of GameStop traded in seven sessions, and Citadel and Steve Cohen injected nearly $3 billion into Melvin Capital.

Robinhood’s January 28 buy restriction turned a liquidity problem into a market-structure crisis. Users could sell but not buy, GameStop fell 44%, and the speakers largely agreed Robinhood faced margin pressure; their dispute was whether this was unforeseeable hypergrowth or negligent undercapitalization that should have been stress-tested months earlier.

The episode raises a serious Citadel conflict question but presents no evidence of a coordinated “fix.” Citadel was a major buyer of Robinhood order flow while also helping rescue Melvin; Sacks explicitly wanted the relationship investigated and estimated a 99% chance no direct pressure had occurred.

The sharpest internal conflict was between investor loyalty and accountability to customers. Jason Calacanis, a Robinhood investor, argued investors should support founders through crises; Chamath Palihapitiya countered that investors owe duties to users and employees too, and that Robinhood’s known clearing obligations made the failure a governance problem.

Even panelists sympathetic to WallStreetBets warned that late GameStop buyers were likely to be left holding the bag. Sacks called the original squeeze strategy brilliant because it exploited overextended shorts, but said hedge funds had regrouped and newcomers buying at extreme prices were unlikely to fare well.

Chamath’s reform agenda targeted leverage and opacity rather than banning short selling or options. He proposed preventing shares from being lent multiple times, imposing hedge-fund leverage limits, requiring frequent position disclosure, preserving open trading, and replacing capital-gains taxes with a 0.1% transaction tax intended to discourage short-term turnover.