SAN delivered its Q1 2026 results on April 29, and the most striking story in the data is not the price — it's how quickly shorts moved to unwind ahead of and after the release.
Short sellers trimmed exposure aggressively this week. Estimated short interest dropped roughly 17% over the past seven days, falling from a peak of around 82.6 million shares on April 17 to 67.6 million by April 28. That retreat pulls the position back toward late-March levels, having briefly expanded sharply through mid-April. The short score, sitting at 52.3, has also drifted lower from 54.4 on April 17 — modest in absolute terms but directionally consistent with shorts backing off into the numbers.
The borrow market tells a more complicated story. Cost to borrow nearly doubled on the week, rising from roughly 1.5% to 2.74% by April 28. That jump — the highest borrow cost in the 30-day window — came even as short interest itself was falling. A possible read: the shorts that remained after the big unwind faced a tighter pool of available stock, pushing up the marginal cost to maintain those positions. Lending availability has tightened meaningfully over the past few sessions, with the utilisation rate climbing back to 68.5% — up sharply from 58% the previous session and not far below the 52-week high of 75.9%.
Options sentiment, meanwhile, is firmly bullish. The put/call ratio printed at 0.29, sitting well below its 20-day average of 0.34 and just off the 52-week low of 0.24 hit earlier this month. The trend here is clear: call demand has dominated since early April, and the ratio has been grinding lower almost continuously since late March when it was above 0.42. At a z-score of -0.77 below the recent mean, options positioning does not reflect any meaningful defensive hedging.
Valuation remains undemanding for a diversified bank of Santander's scale. The price/earnings multiple is at 10.1x, having expanded about 0.9x over the past 30 days as the stock rallied 13% over the month to close at $12.07. Price-to-book is at 1.37x, also up roughly 0.14x over 30 days. Both moves reflect the re-rating that European bank stocks have enjoyed in 2026, with Santander among the beneficiaries. An earnings yield of around 9.9% keeps the valuation case intact for income-oriented investors. Analyst data in the snapshot is too dated to draw current Street conclusions, but the EPS surprise factor score ranks at the 83rd percentile — suggesting the bank has a consistent track record of beating estimates.
On the institutional side, the ownership base is deep and stable. BlackRock and Vanguard together hold over 11.6% of shares, and Capital Research added over 5.5 million shares in the most recent quarter. These are index and long-only flows rather than tactical bets, providing a structural floor to the register. Insider activity is limited and mostly routine: a small sale by a Senior Executive Vice President at $10.95 in March is the only cash transaction in the recent window, well below any meaningful signal threshold.
With Q1 now in the rear-view, the next confirmed event on the calendar is July 22. The question worth watching into that date is whether the short-interest unwind continues — and whether borrow costs normalise as positions close — or whether macro headwinds to European banks prompt fresh short rebuilding ahead of mid-year results.
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