Super Micro Computer enters the week with two signals moving in the same direction at once — short interest is climbing again and options traders are the most defensive they have been in weeks.
The short trade has shifted from consolidation to active rebuilding. The previous note, filed July 6th, described short interest holding steady near 95.9 million shares after a 24% weekly surge. That stability has broken. Short interest has climbed 8.2% over the past week to 109.9 million shares — now 18.4% of free float, the highest reading in at least 30 days and up roughly 41% from mid-June levels. The move is not a one-day event: the build has been steady since July 3rd, adding roughly 14 million shares in a week. Against that, borrow cost remains remarkably low at 0.48%, barely changed from a week ago. Shorts are adding aggressively into a cheap, accessible lending market.
The options picture has flipped sharply from the normalisation the prior note described. The put/call ratio has jumped to 0.83 — from 0.70 last week — and now sits nearly two standard deviations above its 20-day average of 0.73, at a z-score of 1.95. That is the second-highest defensive reading of the past year, behind only the 0.90 print on June 30th. Availability has tightened in tandem, dropping roughly 31% on the week to 142.7% — still within a normal range but moving meaningfully in one direction. Short sellers are building positions, options traders are buying protection, and the borrow market is tightening. The signals are aligned.
The Street remains cautious rather than negative, with most active coverage clustered around neutral ratings. The most recent action came from Citigroup, which raised its target to $33 from $31 on July 13th while holding its Neutral rating — a modest upward revision that leaves the target well below the broader consensus mean of $37.38. The stock closed Tuesday at $27.65, up 5.3% on the week but still down more than 9% over the past month. That recovery is thin cover: HPE rose 14% and DELL gained nearly 10% in the same period, suggesting SMCI is trailing its closest peers on the week's bounce. The factor score picture underlines the split: forward EPS growth ranks in the 99th percentile of the universe, but the short score rank sits in just the 4th percentile — meaning the stock screens as a high-growth name that is simultaneously one of the most heavily shorted in the market.
The bull case rests on AI infrastructure demand and a strong backlog, with the most recent earnings print delivering a 24% one-day gain and a 17% five-day move. The bear case — legal and operational overhang, debt load, potential ASP pressure — is what is fuelling the short rebuild. With the next earnings event scheduled for August 4th, the setup heading into that print looks notably more charged than it did a week ago. The question worth watching is whether the short rebuild continues to accelerate into that date, or whether the cheap borrow and improving price action begin to attract covering pressure before results arrive.
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