Chip stocks rebound as US short positions hit a record high

On the first day of the earnings week, the semiconductor market laid two “bottom cards” on the table at the same time—and these two cards point in completely opposite directions
The board is rising: Ambarella up 6.24%, Teradyne up 3.54%, Marvell up 3.32%. The AI and chip sectors led the rebound, and it looks like sentiment is repairing
But at the same time, the proportion of short positions in S&P 500 constituents (as a share of free-float shares) has risen to 3.79%, and Russell 3000 to 6.3%—both numbers have set record highs
Over the past eight weeks, hedge funds have net sold US technology stocks in six of them, cutting exposure by about 10%—the largest reduction in more than a decade
Stocks are up, and “smart money” is running—this divergence is precisely the most worth pondering part
The reason shorts have stayed committed is persistent concerns about the ROI of AI investment. This concern isn’t new, but it is being supported by an increasingly specific figure
Research by Nikkei shows that the off-balance-sheet, implicit debts of five tech giants—Alphabet, Microsoft, Amazon, Meta, and Oracle—have grown eightfold over four years, with a total size of about $1.65 trillion, already exceeding their book debt
Meta alone is about $420 billion, nearly three times its book debt. BlackRock plans to issue more than $12 billion in bonds to finance Meta’s data centers in Texas
This means the AI arms race is becoming increasingly dependent on debt financing. As long as AI revenue returns keep running fast enough, the structure can be maintained. But once returns fall short of expectations—or the interest-rate environment tightens again—these off-balance-sheet debts will turn into systemic pressure points
So this week’s earnings are a real test—not whether revenue can beat expectations, but whether capital expenditure guidance holds up. If these companies keep stepping up AI spending while revenue growth starts to slow, the shorts’ logic will be validated. If AI monetization starts accelerating, then today’s rebound will count as truly consolidating
Chip stocks are rising, but the fact that short positions have hit record highs in itself tells you that a substantial amount of capital in the market believes this rebound can’t be sustained. Who is right and who is wrong—earnings will decide
DYOR Not investment advice