ECARX Holdings has become one of the tightest borrows on Nasdaq. Availability has collapsed to just 2.1% — fewer than one share remains for every 47 already borrowed. At the same time, the stock has rallied 32% in a week.
Availability dropped 65% in seven days. That is the defining data point here.
Cost to borrow jumped 86% over the same period, reaching 6.17% APR as of June 3. That is not extreme on an absolute basis, but the speed of the move matters. When a stock rallies hard and the borrow simultaneously dries up, short sellers face a compounding problem: covering becomes more expensive every day they wait.
The lending market has been structurally tight for weeks. Looking back through May, availability was already below 6% for most of the month. It briefly touched 0.43% on May 7. The current 2.1% level is not a new phenomenon — it is a continuation of a market that has had almost no slack.
Short interest as a percentage of free float sits at 1.78% — low in absolute terms. But the direction is what flags attention. Short interest jumped 53% over the past week, even as the stock climbed 32%.
That is an unusual combination. Bears added to positions into a sharp rally. With availability near zero and cost to borrow accelerating, any reversal in sentiment could accelerate covering pressure fast.
The ORTEX short score stands at 56.9 out of 100. It rose sharply around May 26, jumping from the low 52s to above 57 in a single session. It has held that elevated level since.
The utilization rank sits in the 2nd percentile of the universe — meaning nearly every stock has a looser lending market than ECX right now. Days-to-cover ranks in the 6th percentile. Those are extreme readings.
The ORTEX short score history confirms this shift was abrupt. On May 25 the score was 52.2. By May 26 it had jumped to 57.1. Something changed in the borrow market that week — and it has not reversed.
What to watch: Availability at these levels leaves almost no room for further tightening. Any sustained selling could force covers quickly, while the 86% weekly CTB spike signals prime brokers are already repricing the risk of holding short positions here.
See the live data behind this article on ORTEX.
Open ECX on ORTEX →ORTEX Market Intelligence content is generated by AI from a snapshot of ORTEX's proprietary data. Content is informational only and does not constitute investment advice.
