Short Selling Statistics (2026)

Short selling is a large and permanent feature of US markets, not a fringe activity. Total regulatory-reported short interest is about $1.55 trillion, mostly held in actively traded institutional portfolios, according to securities-finance analytics firm S3 Partners (see the table below).

That figure spans single stocks and ETFs. There are roughly 2,908 ETFs with active short positions carrying about $234 billion of short interest, and the semiconductor complex alone carries about $60.1 billion, a sign of how concentrated bearish bets can be by sector.

Short interest is the total number of shares that have been sold short but not yet bought back to close the position. When you short, you borrow shares, sell them, and hope to rebuy them lower. Short interest is the running tally of those open bets.

In the US, FINRA Rule 4560 requires member firms to report their short positions twice a month, at the mid-month and month-end settlement dates, and FINRA publishes the data roughly seven to eight business days later. That reporting lag is why real-time estimates from vendors like S3 exist alongside the official figures.

Across US equities, the average stock has roughly 4.8% of its float sold short, per S3 Partners. Academic work using FINRA-style data puts the average firm's short interest ratio near 5.2% of shares outstanding, with a maximum around 91.8% for the most heavily shorted names.

Short sales are also a big share of daily trading. Older academic estimates found short sales made up roughly 24% of NYSE volume and about 31% of Nasdaq volume, so a meaningful slice of every day's tape is a short seller opening or covering a position. Those trading-share figures are dated and vary with market structure.

The most shorted stocks by percentage of float tend to be troubled or hyped small and mid-caps rather than megacaps. In an early-2026 aggregator snapshot, names like Groupon (about 46% of float), Hertz (about 44%), and Better Home & Finance (about 44%) topped the list (see the table below).

These rankings are noisy: they change with every twice-monthly FINRA report, and third-party screeners sometimes show implausibly high readings above 90% of float that should be treated with caution. A high short-of-float reading is exactly the setup that can fuel a squeeze if the thesis turns.

By dollar value rather than percentage, the largest short positions are the biggest companies. As of September 2025, NVIDIA carried the largest notional short at $34.3 billion, followed by Tesla ($32.7 billion), Microsoft ($30.6 billion), and Apple ($27.7 billion), per S3 Partners (see the chart and table below).

This is mostly a size effect: a small percentage of a multi-trillion-dollar company is still an enormous dollar figure. It does not mean these stocks are heavily shorted relative to their float, and much of it is hedging rather than outright directional bets against the company.

In a market that rises over time, betting against stocks is a structural headwind. Short sellers lost close to $178 billion on a mark-to-market basis in 2023, with the six worst positions all part of the Magnificent Seven as names like NVIDIA, Tesla, and Meta more than doubled. Individual episodes were brutal: Coinbase shorts lost over $4.2 billion and Carvana shorts about $2.25 billion.

The payoff is also asymmetric. A long position can only fall to zero (a 100% loss) but can rise many times over; a short is the mirror image, with capped gains and theoretically unlimited losses. That is why a single squeeze can wipe out years of a short seller's gains.

Despite the losses, short sellers carry real information. Research by Diether, Lee, and Werner found a strategy long lightly shorted stocks and short heavily shorted ones earned about 2.6% a month on a one-day horizon and 2.9% at five days, and that short sellers correctly anticipate negative abnormal returns.

The nuance is who is shorting. Studies find institutional short sellers help make prices more efficient, and even retail short sellers predict negative returns, yet as a group short sellers still perform worse than other traders with far more variable profits. Being right on direction does not guarantee surviving the volatility.

Activist short sellers publish research alleging fraud or overvaluation, then profit if the stock falls. In the first half of 2024, shares targeted by activist campaigns fell an average of about 11.3% after the reports, even as the S&P 500 rose 14.5%, according to Breakout Point, which counted about 65 new major campaigns in that period.

The field is shrinking, though. Breakout Point tracked about 42 active activist-short firms in 2024, down from roughly 62 in 2020, and Hindenburg Research, the most prolific by report count, shut down in January 2025. Legal costs, litigation risk, and a relentless bull market have thinned the ranks of these self-appointed fraud-hunters.

The January 2021 GameStop episode is the defining modern short squeeze. About 140% of the public float had been sold short, more shares than actually existed as free float, and when Reddit's r/wallstreetbets crowd bid the stock up, shorts had to buy back at any price. GME rose roughly 1,500% in two weeks and traded over $500 pre-market on January 28 (see the table below).

The damage was enormous. Short sellers lost about $19.75 billion year-to-date, including nearly $8 billion in a single day, per S3 Partners. Melvin Capital lost roughly $6.8 billion, about 53% of its assets. Goldman Sachs noted that short interest above 100% of float had happened only about 15 times in the prior decade.

GameStop was not the largest squeeze. That title usually goes to Volkswagen in October 2008, when Porsche revealed it controlled about 74% of VW through shares and options, leaving only about 6% as free float against roughly 12% sold short. VW briefly became the world's most valuable company at around $370 billion, and short sellers lost an estimated $30 billion (see the chart and table below).

The common thread is scarcity: when the shares available to buy back shrink far below the short position, covering becomes a stampede that feeds on itself. Estimated short-seller losses across the biggest episodes run from a couple of billion dollars up to Volkswagen's $30 billion.

Shorting is not free: you pay an annualized borrow fee to whoever lends you the shares. For liquid, easy-to-borrow names the fee averages about 0.25%, a rounding error. But when a stock becomes hard to borrow, the rate can exceed 25%, and it climbs with short demand (see the table below).

GameStop illustrates the extreme. Its borrow fee sat near 1% in January 2019, jumped to about 34% at the onset of the 2021 squeeze, and topped 50% in February when the stock was nearly impossible to borrow. A high borrow fee is both a cost and a warning sign that a crowded short may be about to unwind.

Most individual investors who want downside exposure use inverse ETFs, but these decay if held too long. The ProShares Short S&P 500 (SH) targets minus-one-times the index's daily move, and because it resets daily it has lost roughly 85% since its 2006 inception, with 3-year and 10-year annualized returns around -10% to -12% (see the chart above).

The culprit is volatility drag: after a down day and an equal-percentage up day, the index is flat but the inverse fund is down. That compounding makes daily-reset inverse and leveraged products tools for short-term hedging only, not long-term bearish bets. These fund figures come via aggregators and should be checked against current disclosures.

Short selling is legal and regulated. The SEC's Regulation SHO governs share location and delivery, and the alternative uptick rule (Rule 201) restricts short selling in a stock once it falls 10% or more in a day. FINRA collects and publishes the short-interest data that underpins most of these statistics.

Enforcement gaps remain. Naked short selling and fails-to-deliver persist: FTDs peaked at about $19.8 billion in September 2024, and a 2025 petition argued Reg SHO has not eliminated them after two decades. Proposed fixes include a mandatory pre-borrow requirement and penalties for failing to deliver.

For most long-term investors, the honest takeaway is that shorting is hard to win at. The market's upward drift, unlimited downside, borrow costs, and squeeze risk all work against you, which is why short sellers as a group lost about $178 billion in a single strong year. Short interest is more useful as a sentiment signal than as a trade to copy.

You can still use the data. A high short-of-float reading flags either a broken business or a potential squeeze, and activist short reports are worth reading as a fraud check on names you own. But betting the short side is a professional's game; a diversified, long-biased portfolio is a far more reliable way to build wealth.