Checking Borrow Before You Short

Selling a stock short means selling shares you don't own, with a promise to deliver borrowed shares at settlement. Regulators require a locate before the trade — a reasonable belief, typically confirmed through a broker's borrow desk or an automated "easy to borrow" list, that shares are actually available to deliver. Skipping this and shorting anyway risks a failed settlement, which brokers and regulators treat seriously and can force a costly buy-in to fix.

Even when a locate succeeds, availability isn't free. Easily borrowed, liquid large-cap names carry a near-zero borrow fee, but heavily shorted or thinly floated names can become "hard to borrow" or even go "on special," with annualized borrow fees running into double digits. That fee accrues daily for as long as the position is held and directly eats into the short's expected return, sometimes turning an otherwise attractive short thesis unprofitable once financing costs are included.

Worked example. A stock trading at $50 with a 25% annualized borrow fee costs roughly $0.03 per share per day just to hold the short ($50 × 0.25 / 365 ≈ $0.034). Held for three months, that's about $3.10 per share in borrow cost alone — a meaningful hurdle a short thesis targeting a 10% price decline ($5/share) must clear before the borrow fee is even accounted for.