Citi says short sellers in the S&P 500 face mounting losses as U.S. equity positioning moves back to net long, a shift the bank says increases the odds of a short squeeze. Fresh long buying, not short covering, is driving the move across the U.S. and Europe, while Australia, China and South Korea show more uneven positioning.
S&P 500 shorts face mounting pressure
Average losses across S&P 500 short positions are now elevated, Citi said, leaving the short base exposed to forced buying if the market keeps climbing. If equities keep advancing, short sellers facing mounting losses may be forced to buy shares to close their positions.
That buying could itself add upward pressure, potentially accelerating the rally through a short squeeze. Citi said the current imbalance between potential gains and losses means positioning risk is "skewed toward additional squeeze-driven flows."
Fresh long positions, not short covering, drive the shift
Citi strategists said positioning strengthened across all major U.S. equity indices during the latest week, and the improvement came mainly from investors opening new long positions rather than closing existing shorts. The Nasdaq and S&P 500 registered similar week-on-week gains, with both moving out of bearish territory and back to a net long stance.
The Russell 2000 remains the most extended U.S. index Citi tracks, meaning positioning in smaller companies has already run further than in the large-cap benchmarks. Because the shift reflects fresh capital rather than traders simply exiting losing bets, Citi reads it as a sign of greater underlying confidence in the outlook.
Europe leads the global positioning rebound
European markets produced one of the clearest recoveries in global positioning, Citi said, with new long positions pushing the EuroStoxx 50 and FTSE toward moderately bullish levels. The DAX has also kept recovering from earlier weakness, aligning more closely with the already-constructive stance in European banking stocks.
Outside the U.S. and Europe, positioning improved in Australia's S&P/ASX 200 and China's A50 index, though conditions stayed uneven across Asia. South Korea's KOSPI continued to deteriorate instead, leaving the market with a one-sided short book that Citi says could unwind sharply if sentiment turns.
For the S&P 500, further gradual gains could keep squeezing short sellers, adding another potential source of support for the rally.
Source: InvestorsHub
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