Short interest in the S&P 500 index has climbed to approximately 3.7% of its free float—nearing its highest level since 2010—prompting market commentator The Kobeissi Letter to warn that "conditions for a short-squeeze are rising".
As traders build heavy short positions against American equities, these elevated short levels across key benchmarks are creating significant potential for a rapid upward market rally.
Surging Bearish Bets Across US Equities Data from S3 Partners and Bloomberg highlights that "bearish bets on US stocks are surging" steadily across major equity indices.
Short interest in the broad-market Russell 3000 index has reached approximately 6.1% of its free float, hovering near an all-time high as both metrics have climbed steadily since the start of 2025.
Pessimistic sentiment is even more pronounced across the broader stock market.
