The short side is getting crowded
If you thought traders were feeling brave, think again. Short interest in the S&P 500 has climbed to about 3.7% of free float, while the Russell 3000 is sitting around 6.1% — both flirting with record-ish territory. Translation: a lot of people are betting against the market, and that can get uncomfortable fast.
Why investors should care
Crowded shorts are like a pile of folding chairs at a wedding after the DJ cranks the music. If the market keeps grinding higher, those bearish positions can get squeezed into buybacks, which can add even more fuel to the rally. The Kobeissi Letter says exactly that: conditions for a short-squeeze are rising.
SPY, QQQ, and DIA are the receipts
The story isn’t just theoretical. SPY shorted shares reportedly rose from 102.34 million to 109.82 million in the latest settlement period, leaving the ETF with a days-to-cover ratio of about 1.71 days. That’s not a tragedy on its own, but it does mean shorts would need nearly two full trading days of normal volume to unwind — and that’s before any panic-buying stampede.
Big picture
The weirdest part? The market has already been pretty sturdy in 2026, with the S&P 500, Nasdaq, and Dow all up year-to-date. So the bearish crowd is making a big macro bet here. If they’re wrong, the unwind could be loud.