Why this matters — Three distinct ORTEX data streams have converged on DEO (Diageo plc) simultaneously: short interest, borrowing cost, and utilization have all spiked in tandem. Short interest jumped 54% in one month while utilization hit a 52-week high, signalling a rapid and coordinated build in bearish positioning.
Short Interest surge. Shares short reached 4.27 million as of April 24. That is a 24.7% rise in a single week and a 54% climb over the past month. The pace of accumulation has accelerated sharply — the bulk of the increase arrived in the final week of April.
Utilization at record levels. SI utilization hit 97.4% on April 24. That matches the 52-week high. One month ago it stood at 74.67%. The near-vertical climb from ~75% to ~97% in under three weeks indicates borrow inventory is being absorbed almost entirely.
Cost to borrow elevated. CTB stood at 1.10% on April 24. It spiked to 1.43% on April 17 before easing slightly. The one-month change is +3.6%. While not extreme in absolute terms, the volatility in CTB reflects tightening supply of lendable shares — consistent with a market where borrowers are competing for limited inventory.
Options sentiment has shifted decisively toward calls. The put/call ratio fell to 0.65 on April 24 — well below its 20-day mean of 0.84 and a PCR Z-score of -1.80. That sits near its 52-week low of 0.59. This divergence is notable: options traders are net bullish while short sellers build. The two camps are positioned against each other. Artisan Partners added 38.4 million shares in the most recent reporting period, a substantial institutional accumulation. Causeway Capital Management added 10.4 million shares. Both builds occurred as short sellers were simultaneously scaling up positions — a direct tug-of-war in the register.
The last earnings release on February 25, 2026 triggered a -16.3% single-day drop and a -19.5% five-day move. The next event is scheduled for May 7, 2026. The current short buildup is occurring in the 10-day window ahead of that release — a pattern consistent with pre-earnings bearish positioning.
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