Advanced Biomed Inc. heads into its May 21 earnings event with a striking story: shorts that spent three weeks piling in have unwound almost entirely, while borrow costs remain among the most extreme in the market.
The short-selling setup here is genuinely unusual. From early April through the first week of May, short interest climbed from roughly 25,000 shares to a peak of around 156,000 shares on April 9 — a near-600% build in three weeks. The borrow market locked up in tandem, with availability tightening to near zero and cost to borrow spiking from around 330% to above 800% annualised. That was a classic sign of scarce supply and aggressive demand to short. Since then the trade has reversed hard. Short interest collapsed more than 94% over the past month to just 7,500 shares on loan, and availability has loosened dramatically — now running at 245% of outstanding short interest, meaning more than twice the current short position could theoretically be initiated without straining the lending pool. Borrow costs have eased from their peak near 814% but remain extraordinary at 682% annualised, reflecting a micro-cap stock where any meaningful demand to short immediately moves the rate.
The ORTEX short score tells the same unwinding story in aggregate. It peaked at 80.2 on May 6, when short interest was near its local high and availability had tightened to nearly nothing. By May 14 it had fallen to 55.5, a meaningful decompression over just eight trading sessions. The days-to-cover factor rank is elevated at 89, a reminder that even the current tiny short position could take considerable time to exit given the stock's thin trading volume. Market cap is approximately $7.2 million — this is a micro-cap name where positioning moves can be violent relative to float.
The stock itself reflects a rough few weeks. ADVB closed at $4.40 on May 15, down 29% on the week and 30% over the past month. The May 15 earnings release showed Q3 EPS of -$0.38, a marked improvement from -$1.17 in the same quarter last year. Looking at prior earnings reactions in the data, the stock fell 4.5% on the day of its March 2026 print but rallied 21.6% over the following five sessions. The November 2025 print produced a sharper initial drop of 8.7%, followed by a near-flat five-day follow-through. One-day reactions have been negative; the subsequent week has been more variable.
Institutional ownership is dominated by insiders and founders. Yi Lu holds just over 20% of shares, Hung Pau a further 10.8%, and several other named holders each between 3.7% and 6.7%. Combined, the top named shareholders account for more than half the float. That concentration means free float is thin, which amplifies both short-squeeze dynamics when borrowing is tight and the price volatility observed this week.
With the confirmed May 21 event still ahead despite a May 15 announcement already appearing in the record — likely a preliminary or partial release — the focus now is whether the improving EPS trajectory draws any fresh buying interest or whether the post-report drift follows the pattern of earlier quarters.
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