EWU Options Ease, But Short Sellers Return

The put/call ratio on EWU, the iShares MSCI United Kingdom ETF, has fallen to 1.48, two standard deviations below its 20-day mean of 2.98. That is the clearest sign yet that the extreme defensive hedging of late September has unwound. The complication: short interest has simultaneously jumped 20.9% in a single week, and borrowing costs have risen 59%.

Hedging Demand Collapses, Shorts Rebuild

The PCR story has moved fast. In late September it sat above 4.0, near its 52-week high of 5.57. By mid-October it had retreated toward 2.40. Now it is at 1.48, its lowest reading in months, against a 52-week low of 0.80. Options traders have largely stepped back from buying downside protection on UK equity exposure.

Short sellers have not followed the same script. Short interest stands at 2.26% of float as of 19 October, up from around 1.88% a week ago. That remains a low absolute level for an ETF, but the direction and pace of the change are notable. The 20.9% weekly rise reverses the easing trend described in the 14 October note, when short interest had been declining.

Cost to Borrow Moves in Step

The cost to borrow has climbed to 3.28%, up 59% over the past week. That is still not an extreme level in absolute terms. It sits below early-October readings near 3.97% and the mid-September range. But the direction aligns with rising short demand: more investors wanting to borrow shares to sell short, pushing the fee higher.

Availability remains very loose. At 1,981% of current short interest, there are roughly 68 million shares available against fewer than 1.5 million currently borrowed. The lending pool is not under stress. Any cost-to-borrow move here is driven by demand rather than supply constraints.

Two Markets, Two Messages

The options and short markets are sending different signals simultaneously. Options traders have pulled back from hedging, which six weeks ago sat at its most defensive in a year. Short sellers, by contrast, have added positions in the same period. EWU trades at $47.34, up 1.4% on the week but essentially flat over the past month, up just 0.15%.

BlackRock's 13G/A filing from August showed its stake had declined from 30.7% to 21.2% of the class. That is a passive filing, not activist, but the reduction is material context for how the largest holder has been managing its position.

Data Summary

• Short interest: 2.26% of float, up 20.9% week on week
• Put/call ratio: 1.48, down 2.0 standard deviations from 20-day mean of 2.98
• Cost to borrow: 3.28%, up 59% over the past week
• Availability: 1,981% of current short interest; lending pool is loose
• ORTEX short score: 31.1 as of 19 October, edging higher from 29.6 on 16 October
• EWU price: $47.34, up 1.4% on the week, up 0.15% over the past month

The specific thing to watch: whether short interest continues to build toward the 3% to 4% range seen in late September, or whether it stalls as options positioning has already done. If the PCR holds near current levels while shorts keep rising, the two markets will be pricing UK risk very differently.