How shorting works
Borrow a share at $100, sell it, buy it back at $70, return it, and you keep $30. If the price climbs instead, your losses have no ceiling. Brokers charge borrow fees and can issue margin calls. Naked shorting—selling without first locating shares—is restricted under SEC Regulation SHO.
Good or bad for markets?
Many economists see short sellers as improving price efficiency by deflating bubbles and exposing fraud. A study of 2008 crisis bans found they hurt liquidity without propping up prices. But when heavily shorted stocks surge, as GameStop did in 2021, shorts rushing to cover can trigger a short squeeze.
FAQ
- Can regular investors short stocks?
- Yes, with a margin account—but the risk is high.
- What is short interest?
- The share of a stock's float currently sold short.
Sources reviewed: 2026-10-26
References
- Miller, E. M. (1977). Risk, uncertainty, and divergence of opinion. Journal of Finance, 32(4), 1151–1168.
- Beber, A., & Pagano, M. (2013). Short-selling bans around the world: Evidence from the 2007–09 crisis. Journal of Finance, 68(1), 343–381.
