SBLX, the micro-cap auto tech firm StableX Technologies, has seen its lending market tighten dramatically. Short interest, cost to borrow, and availability have all moved sharply in the same direction — and all within days.
SI % FF stood at under 1% of free float as recently as mid-March. By April 28 it had hit 19.8%. That is a 2,357% rise over 30 days.
The acceleration compressed into the final two days alone. Short shares jumped from roughly 98,000 on April 27 to 288,750 on April 28 — a near-tripling overnight. The one-week change is 122.5%.
At the same time, the stock has rallied. Price is up 69% over the past month and gained 23.5% on April 28 alone. Short sellers have been pressing into a rising name.
Cost to borrow held between 4% and 5.5% APR for the entirety of March and early April. On April 28 it jumped to 30.4% — a 509% weekly spike.
That move reflects a borrow market under sudden stress. Availability has tightened sharply in step. Utilization data confirms the picture: on April 27 the lending pool was roughly half-used at 49.2%. By April 28 it had leapt to — just below the 52-week high of 97.3%.
At that level, fewer than four shares remain available for every hundred already lent out. The borrow pool is effectively exhausted.
SBLX is scheduled to report next on May 12. Past earnings prints have produced moves ranging from -10% to +28% over five days. With short interest now near 20% of float and the borrow pool nearly drained, the earnings date adds another layer of tension to an already compressed lending situation.
Peers in the micro-cap EV and auto space — including LCID and CENN — have both pulled back over the past week, while SBLX has moved sharply in the opposite direction.
Key figures — April 28, 2026
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