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MP Materials enters the week in a rare position: the stock is bouncing hard, up 6.8% on the week and 3.6% on Tuesday alone, yet it carries one of the most structurally charged short books in the market.
The borrow market tells the story most clearly. Availability has dropped to zero, every share in the lending pool is currently out on loan, and that reading has held at zero for every session since September 21. Cost to borrow has eased modestly on the week, pulling back to 1.41% from around 1.70%, but it remains more than 50% above where it was a month ago. Short interest itself has climbed 22% over the past month and now represents 20.5% of the free float, up from roughly 18% at the start of September. FINRA's fortnightly official print put days-to-cover at 7.1. The ORTEX short score has been locked in a tight band around 75.9 for the past two weeks, ranking in the bottom 1st percentile of the universe on both short score and borrow availability. Days-to-cover ranks in the 4th percentile. That combination, a large and growing short book, no available shares to borrow, and a stock that just ripped 7% in a week, is the defining tension on this name right now.
Options positioning offers no clear directional lean. The put/call ratio is 0.50, almost exactly in line with its 20-day average of 0.51 and a z-score of essentially zero. It has been range-bound for most of September. The 52-week high on the PCR was 1.01, so current options flow is nowhere near defensive territory. That calm stands in contrast to the agitation in the lending market.
The Street broadly remains constructive but has been trimming targets. This week, Morgan Stanley's Carlos De Alba cut his price objective to $66 from $73 while keeping his Overweight rating. Baird trimmed to $65 from $80 last week. Earlier moves from JP Morgan, Needham, Barclays, and Deutsche Bank all ran in the same direction through July, lowering targets while holding positive ratings. The consensus mean now stands at $73, implying roughly 50% upside to Tuesday's close at $48.53. Bulls point to Mountain Pass as the only scaled North American rare earth supply base, NdPr oxide production up 41% year over year in Q2, a 10-year price floor on NdPr products, the Department of Defense-backed offtake, and Apple partnership prepayments as a funding mechanism. Bears flag that Stage II and Stage III development carries real execution risk around commissioning and capital costs, that more than 80% of product revenue still runs through Shenghe Resources, and that near-term sales assumptions have been revised down for Q3 and Q4. Valuation reflects the uncertainty: the trailing P/E is 77.7x, price-to-book is 4.7x, and EV/EBITDA is roughly 26x. The earnings-surprise factor score is at the 99th percentile, which tells you the company has been beating numbers consistently, but that bar raises the stakes for the next print, due November 5.
The ownership register adds a notable dimension. CEO and Chairman James Litinsky filed a Schedule 13D/A in January, an activist-designated filing, disclosing his stake had fallen from 9.0% to 7.3%. The institutional data shows his holdings have since declined further to around 6.5% of shares as of early June. That is still a meaningful position, but the direction of travel since June 2026 has been downward: EDGAR Form 4 records show he sold roughly $12.8 million of stock on June 3 at prices between $68 and $71, well above the current level. The COO, Michael Rosenthal, moved the other way, buying $543,000 of stock at $54.30 on June 9. Hancock Prospecting and BlackRock are the two largest institutional holders at roughly 8.3% each. T. Rowe Price added nearly 1.9 million shares in the most recent reporting period, the largest incremental buyer among the visible institutional holders. D.E. Shaw built a position of 5.8 million shares over the past quarter. Disclosure caveat: Schedule 13D/G stakes are as-last-disclosed around the 5% threshold; holders dropping below 5% may exit without a further filing.
Retail attention has also ticked up, with Wikipedia pageview z-scores running at 1.6 against the prior 90-day history as of late September, a sign of elevated retail interest relative to the stock's recent norm, though that dataset has not been tested as a lead against any of MP's financial metrics.
With no available borrow, a 20% short float, and a fresh analyst target cut from Morgan Stanley the morning of October 7, the question heading into November 5 earnings is whether the short book stays put or gets forced to move.
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