At the end of January 2021, a group of stocks listed on US stock exchanges experienced sudden surges in their stock prices, which - coupled with high short interest – led to brief short squeeze episodes. We argue that these short squeezes were the result of coordinated trading by retail...

This paper develops a theory of multiple unit auctions with short squeezes in the post- auction market. This is especially relevant for financial and commodity markets where players may enter the auction with established forward positions. We study how a potential short squeeze impacts on...

Most stock exchange regulators around the world reacted to the 2007-2009 crisis byimposing bans or regulatory constraints on short-selling. Short-selling restrictions wereimposed and lifted at different dates in different countries, often applied to different sets ofstocks and featured different...

Can limits to arbitrage explain historical asset price reversals? During the "British Bicycle Mania" of 1896-1898, cycle share prices rose by 200 per cent before falling 76 per cent from their peak value. This paper argues that arbitrage during this episode was limited by the risk of being...

This paper analyzes how newly introduced transparency requirements for short positions affect investors' behavior and security prices. Employing a unique data set, which contains both public positions above and confidential positions below the regulatory disclosure threshold, we offer several...

Using the exogenous shock of the COVID-19 pandemic, we study how informed market participants evaluate fiscal space. Short-selling activity shifted upon the onset of the pandemic towards companies with low financial flexibility only in countries with limited fiscal space. Among these companies,...