RGC enters the week with its lending pool nearly exhausted — a condition that has persisted for days and is now intensifying as short interest accelerates sharply higher.
The borrow story is the dominant angle here. Availability has collapsed to just 1.66% — meaning roughly one share remains available to borrow for every sixty already lent out. That is close to the tightest the market has been all year; the 52-week low touched zero. This extreme tightness has kept cost to borrow anchored near 370%, a level that has held stubbornly since late June after easing from a May peak above 425%. Anyone entering a fresh short position is paying nearly four times the stock's value per year just to hold the borrow. Short interest itself has surged 56% over the past week to roughly 1.68 million shares, and is up 168% over the past month — a build that, against this backdrop of near-zero availability, reflects growing conviction among bears even as the cost to do so becomes increasingly punishing.
The ORTEX short score reinforces how extreme the setup has become. At 77.0, it ranks in the 6th percentile of all stocks — meaning 94% of names carry a less aggressive short-side signal. The utilization rank sits at the 1st percentile: the most fully borrowed lending pool in the universe. Days-to-cover is running near 7.8 days on the official FINRA data, meaning it would take the equivalent of nearly two trading weeks of average volume to unwind the reported short position. The options market offers a mild counterpoint — the put/call ratio has actually eased to 1.18, below its 20-day average of 1.26, suggesting options traders are slightly less defensive than they were through most of June when the PCR ran as high as 2.05. That divergence is worth noting: the lending market screams stress while options positioning looks relatively calm.
The stock has experienced meaningful volatility around its last few earnings prints, with the most recent — May 8 — producing a 13% single-day decline and a 9% loss over the subsequent five sessions. The October 2025 report was worse: down 17% on the day and 20% over the following week. The next event is scheduled for late October 2026, leaving a long runway before that catalyst. Ownership is highly concentrated, with founder Yat-Gai Au holding approximately 88% of shares — a structure that leaves an extremely thin float for the short interest already in place, amplifying the mechanics of any dislocation.
The stock closed at $5.95 on Tuesday, up 6% on the day but down 2.3% on the week and 70% lower over the past month. Correlated peers were mostly weaker: ASBP fell 8.6% on the week while BSEM dropped 5.6%, suggesting the broader micro-cap biotech tape remained under pressure. Analyst coverage is absent, leaving no price-target framework to anchor valuation.
The key tension to watch is whether the accelerating short interest build — against availability that is already near zero — creates the conditions for a technically-driven price dislocation, or whether continued high borrowing costs cause short sellers to trim rather than add further.
See the live data behind this article on ORTEX.
Open RGC 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.
