Weekly Digest

The week of April 27 saw short interest surge across both ends of the market. Sector ETFs tracking Industrials, Materials, and Utilities all flashed borrow-market warnings. Meanwhile, several micro-cap names posted triple-digit weekly SI jumps, with at least one recording its steepest single-session spike on record.

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Top Movers

SMTK — SmartKem posted the week's most extreme single-day move. Short interest surged 325% in one session to 8.65% of free float. That is the steepest intraday jump the stock has ever recorded. Market cap sits at just $5M.

KWM — K Wave Media saw short interest explode 391% over the week to 423,042 shares. Utilization reached 95.7%. Cost to borrow hit 144.88% APR. Availability of SI is just 7.8%, meaning borrow supply is near exhausted.

MOVE — Corvex reported a 64% weekly SI surge to 51,161 shares. Cost to borrow remains elevated at 156% APR. Notably, availability stands at 411% of SI — borrow supply is not the constraint here.

NCT — Intercont (Cayman) swung violently. SI dropped 15% in a single day but remains up 111% week-over-week. Cost to borrow climbed to 54% with utilization at 74%.

ATER — Aterian drew convergence attention. Cost to borrow hit 297% APR. Availability of SI is just 4.9%. The borrow market is effectively seized.

BJDX — Bluejay Diagnostics moved the other way. SI plummeted 72% in the week to 0.42% of float — its lowest level in months. Cost to borrow holds near 49%.

SLNH — Soluna Holdings carries 34% SI as a percentage of free float. Borrow availability sits at 29% of SI — the tightest in a year. A convergence signal flagged the alignment.

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Sector Themes

ETF Bears Load Up on Cyclicals

Three major sector ETFs triggered convergence signals this week. All point in the same direction: short sellers are building defensive positions against cyclical and economically sensitive sectors.

XLI — Industrial Select Sector SPDR has SI at 17.1% of free float. Availability of SI is just 36%. Two separate convergence signals fired — one flagging borrow-market capacity limits, one noting shorts piling in across three data points simultaneously.

XLB — Materials Select Sector SPDR carries 10% SI. Availability is 34.7%. Signals showed conflicting pressure: bullish options bets clashing with peak borrow demand. Short sellers retreated slightly but the borrow market remains tight.

XLU — Utilities Select Sector SPDR has 5% SI with availability at 53%. A convergence note flagged shorts tightening fast in a sector often treated as a safe haven.

The pattern is clear. Short interest is rising on economically exposed ETFs while borrow supply tightens. This week's 1,579-pulse total reflects broad, cross-sector activity — not an isolated theme.

Micro-Cap Borrow Markets Seize

Several small and micro-cap names saw borrow markets freeze entirely. MNTS — Momentus — carries 30% SI with zero availability. VELO — Velo3D — sits at 32% SI with availability of just 23%. PAPL — Pineapple Financial — has 17.4% SI and a cost to borrow of 380% APR.

These names share a profile: elevated short interest, collapsing borrow supply, and extreme borrowing costs. That combination historically raises short-squeeze risk.

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Convergence Watch

Several multi-signal alignments stood out this week.

OBDC — Blue Owl Capital hit borrow capacity. SI sits at 4.6% of float with availability at just 44% of SI. Multiple bearish signals aligned simultaneously.

VST — Vistra Corp drew bears ahead of earnings. A convergence signal flagged short interest building alongside bearish options positioning. SI is 3.6% of float.

SLNH — Soluna Holdings remains one of the most structurally stressed names. 34% SI meets the tightest borrow in a year. A single convergence note summarised: the setup is historically extreme.

ATER — Aterian triggered a borrow-seizure alert. At 297% cost to borrow and 4.9% availability, there is almost no room left to establish new short positions.

VELO and MNTS both saw repeated convergence signals across the week. Four and five signals aligned respectively at various points — borrow costs, utilization, and short interest all moving in lockstep.

On the bullish-divergence side, RZLV saw call buyers move in as shorts covered. IMUX saw its short position unwind alongside pure bullish options positioning. Both suggest short covering can flip the options market quickly.