Jersey Mike's borrow costs explode as index clock ticks down

JMKE is a New Jersey-based sandwich chain that went public earlier this year. It now faces a compressing borrow market, a stock up 11% in a week, and an index announcement expected within days.

The cost to borrow JMKE shares has jumped to 39.7%, up from roughly 1.1% a week ago. That is a 3,693% rise in seven days. As recently as 28 October, borrowing cost just 1.2%. Now availability has fallen to 19%, meaning fewer than one share sits available in the lending pool for every five already lent out. That is the tightest the borrow market has been in 52 weeks. The ORTEX short score has moved with it, reaching 75.6 on 2 November, up from 62.9 on 27 October.

Costs reverse the unwinding trend

An earlier note from 28 October described shorts unwinding sharply, with short interest dropping from around 14.7 million shares to roughly 11 million. That picture has changed. Short interest now sits at approximately 13.4 million shares as of 2 November, recovering from the trough. The borrow cost explosion since 29 October marks a decisive reversal. Shorts that stayed on after the initial unwind are now paying materially more for the privilege.

Index mechanics add pressure

ORTEX forecasts a 70% probability that JMKE is added to the MSCI World Small, MSCI USA IMI, MSCI USA Small, and MSCI World IMI indices at the November 2026 Quarterly Review. The announcement date is forecast for 11 November, with a trade date of 30 November and effectiveness from 1 December. Combined buying flows from index trackers across those four indices, if the additions are confirmed, are estimated at up to $469M in total. These are ORTEX forecasts, not confirmed additions. JMKE was already added to the Russell 1000 in September 2026, a confirmed event. The approaching MSCI announcement is what traders are pricing into the borrow market now.

Adding to the structural pressure on shorts: the company announced a $100M buyback on 28 October, and declared a $0.35 special dividend payable 19 November. Short sellers borrowing shares must pay that dividend to the lender out of their own pocket on the payment date.

Analysts trim targets but hold ratings

Six analysts lowered price targets on 29 October, following a post-earnings reaction. Guggenheim trimmed to $28 from $29 on 3 November, maintaining its Buy. The consensus mean target stands at $26.34, against a current price of $18.81. Most firms kept positive ratings intact despite the reductions. Wikipedia attention for JMKE registered a z-score of 4.1 against its own 90-day history as of 21 October, indicating a sharp spike in retail interest.

Data summary

• Cost to borrow: 39.7%, up 3,693% in one week
• Availability: 19.0%, the 52-week low
• Short interest: ~13.4M shares as of 2 November
• ORTEX short score: 75.6, up from 62.9 on 27 October
• Stock price: $18.81, up 11.2% over the past week
• MSCI index additions: ORTEX puts probability at 70%, announcement forecast 11 November
• Analyst consensus target: $26.34 (mean), with recent cuts from Guggenheim, Bernstein, BTIG, RBC, Truist, Wells Fargo, Stifel