Gamestonk: What Happened and What to Do about It

The price of GameStop stock exploded from $18.84 at the end of 2020 to a high of $483 on January 28, 2021, before collapsing to under $60 in early February. The stock had long been heavily shorted even before the pandemic. A stock bubble and its collapse inflict collateral damage even on those not participating in the bubble, including index-fund investors. The incident raises questions about the duties of brokers and financial service professionals in the age of social media, and the role of payment for order flow (PFOF). The price dislocation in GameStop highlights several leaks in the plumbing of the US equity market that need to be plugged or else similar dislocations will happen again. The antiquated T+2 settlement cycle needs to be shortened to reduce risk and attendant collateral needs in the system. Institutional short positions should be disclosed on SEC Form 13F just as long positions are. The frequency of short interest disclosure should be increased to daily from the current biweekly. Short positions should be marked to market yearly for tax purposes yearly to eliminate the tax incentive to delay covering short positions. SEC rules 204 and 15c3-3 need to be modernized to help prevent spikes in prices far beyond any reasonable levels. Rule 606 should be extended to require brokers to report retail execution quality.