Korea, Biotech Lead a Mixed Week for Short Sellers

Short covering dominated the week of July 20. Korea-linked ETFs saw dramatic SI drops, while biotech and borrow markets told a more bearish story. A handful of names bucked the trend — shorts added exposure in clinical-stage biotech and niche fixed income plays.

Top Movers

EWY — SI plunges 32% to 25.5% of FF South Korea ETF shorts covered hard. Availability jumped to 371%. That combination signals a broad unwind, not just routine rebalancing. SI at 25.5% is still elevated — but the direction has shifted decisively.

EIS — SI falls 21.9% to 4.0% of FF Israel ETF saw similar covering pressure. Availability hit 458%. Shorts are exiting at scale; borrow is plentiful.

AURA — SI surges 26% to 12.4% of FF The week's clearest build. Bears added exposure to this clinical-stage biotech. Profitability concerns drove the move. At 12.4% of float, the position is material.

SPTL — SI collapses 88% in one day, down 91% on the week Long-duration Treasury ETF shorts almost entirely unwound. The drop to 0.006% of float is near-zero. This was one of the sharpest single-week covering events in the dataset.

CNR — SI falls 30.3% to 0.48% of FF Canadian National Railway shorts cut exposure ahead of Q2 earnings. Cost to borrow dropped 23.8% to 0.50%. Both metrics sit near multi-year lows.

QSR — SI drops 25% to 2.7% of FF Restaurant Brands shorts pulled back from early-July peaks. Cost to borrow fell to 0.57%. The unwind tracks broader consumer discretionary covering.

MSFT and GOOG — noise, not conviction Both showed large percentage jumps in raw SI. MSFT hit 149,025 shares after a 256% one-day spike. GOOG rose 335% on the week to 150,632 shares. Both remain under 0.02% of float. These are data artifacts, not short theses.

Sector Themes

EM ETFs covering in force. EWY and EIS both saw 20%+ SI drops in a single week. Availability surged above 300% in each. Shorts are not just trimming — they are exiting. The Korea and Israel ETF unwinds look coordinated with broader EM risk-on sentiment.

Biotech stays bearish. AURA added 26% to its short position. The sector pulse data flagged multiple clinical-stage names under pressure. Profitability timelines remain the core bear case. Covering flows that dominated other sectors have not reached here.

Duration trades unwinding. SPTL's near-total SI collapse is the week's most extreme single move. Long-duration Treasury shorts were already retreating. This week, they essentially closed. That reflects a shift in rate expectations or position risk management ahead of key macro data.

Tech shorts remain negligible. Despite headline percentage moves, MSFT and GOOG short interest is immaterially small. No meaningful bearish thesis exists in mega-cap tech at these levels.

Convergence Watch

Several multi-signal setups flagged this week.

SPCX — borrow pool near-zero, with put/call ratio hitting new highs. Two separate convergence alerts fired. Availability is essentially exhausted. This is a high-friction short.

SKYY — borrow hit maximum tightness as options demand spiked. Two alerts aligned. Cloud ETF shorts face both a crowded trade and a locked borrow market.

TSLL — borrow market near-zero as SI jumped 24%. Leveraged Tesla longs are being shorted into a frozen borrow pool. Cost to access this trade is rising fast.

EFX — bears dug in as borrow cost doubled. Equifax shorts are paying more to hold the position. That suggests conviction, not opportunism.

CBRS — borrow tightening again as SI climbs. A repeat signal. Shorts are building here while availability shrinks.

SOXQ — borrow eased but options sentiment stayed bullish. Bears and bulls are reading the same semiconductor data differently. The divergence is worth watching into next week.

IQV — options skew flagged caution ahead of earnings. The borrow market alignment adds weight to the put-side signal.

INTC and TER — both had three or more signals align ahead of their respective earnings prints. Intel's convergence fired on earnings day proximity. Teradyne's borrow cost tripled as shorts covered into July 28 results.