LVWR, GDC and SWMR Top 50% Borrow Fees — Why Hard-to-Short Stocks Lag

Summary

Livewire Group (LVWR), GD Culture Group (GDC) and Swarmer (SWMR) are the three U.S. stocks the MarketWatch report says currently sit above 50% annualized borrow cost, and that scarcity is a market signal, not a trading badge. The read-through for investors is bearish for hard-to-short names: a 22-stock basket flagged by the study fell 3.0% through Aug. 26 while the S&P 500 gained 12.0% over the same stretch.

The deeper point is that borrow cost captures a friction in supply, demand and short selling that can keep weak stocks expensive longer than fundamentals justify. In the study cited by MarketWatch on Aug. 27, a hypothetical monthly portfolio of U.S. stocks with borrow costs above 50% posted negative alpha of 81.4% annualized from 2010 through June 2025.

The Full Story

MarketWatch’s Mark Hulbert is not arguing that every hard-to-borrow stock will fall tomorrow. He is arguing that the lending market itself can expose valuation distortion, because when shares are scarce to borrow, shorts cannot absorb excess optimism as easily. That leaves price discovery tilted toward buyers.

The study, Inefficiencies in the Securities Lending Market, was written by Kent Daniel, Alexander Klos and Simon Rottke. Its practical message is narrow but useful: the best short candidates are often not the impossible ones above 50% borrow cost, but the names in the 10% to 50% annualized range, where short sellers can still participate without the economics being eaten by financing expense.

Structural Background

Securities lending is the plumbing behind short sales, and borrow cost is the fee an investor pays to rent shares before selling them short. When that fee rises, it usually means the stock is crowded, difficult to locate or both.

That is why the MarketWatch piece matters beyond one newsletter-friendly list. A Russell 3000 stock with a borrow fee above 50% can look like a short thesis, but the borrowing bill can make the thesis untradeable. The study’s cleaner edge sits in the 10% to 50% band, where the signal survives without the financing penalty overwhelming it.

Why do hard-to-borrow stocks lag even in a bull market?

They lag because scarcity weakens the other side of the market. If short sellers cannot easily enter, overvaluation can persist longer, and rallies can become less about fundamentals than about constrained supply. The MarketWatch data show that this effect can survive even when the broad tape is strong.

Stock & Sector Ripple

• LVWR, GDC and SWMR: all three are above 50% borrow cost, which marks them as expensive to short and vulnerable to squeeze risk if positioning gets crowded.
• Russell 3000 stocks with market caps above $100 million and borrow costs between 10% and 50%: this is the study’s preferred hunting ground for short exposure.
• S&P 500: the 12.0% gain versus the 3.0% loss in the 22-stock basket shows broad-market strength does not rescue structurally weak names.
• Prime brokers and securities lenders: rising borrow fees reflect tighter supply and can make shorting decisions more expensive before price even moves.
• Short-focused hedge funds: execution matters as much as thesis, because competition for borrow can push fees higher and force worse entry levels.

Bull vs Bear Scenarios

The bullish case for the study is straightforward: the 22-stock basket already underperformed by 15 percentage points in eight months, and the historical 81.4% annualized negative alpha for >50% borrow-cost names is a strong signal that the anomaly is real. If borrow costs stay elevated, the overvaluation problem persists.

The bear case for short sellers is just as real: high borrow cost can turn the correct idea into a bad trade if financing gets more expensive or if crowding triggers a squeeze first. A name can be weak structurally and still be dangerous tactically.

Investor Action Points

• Track borrow-cost changes in the next lending update, especially if a name moves across the 50% threshold.
• Watch whether the current 22-stock basket keeps trailing the S&P 500 after Aug. 26.
• Use limit orders if shorting, because crowded borrow can move against you before execution.
• Separate tradability from thesis: a stock can look overvalued and still be too costly to short.

FAQ

What does borrow cost mean for a stock?

Borrow cost is the annualized fee for borrowing shares to short them. When that fee climbs, it usually means supply is tight and the stock is crowded with bearish interest.

Why are hard-to-short stocks often overvalued?

Because short sellers cannot offset buying pressure as easily, prices can drift above fundamentals. The MarketWatch report ties that imbalance to persistent underperformance once the crowding unwinds.

Can you make money shorting stocks with borrow fees above 50%?

Not easily, according to the study cited by MarketWatch. The paper found that the >50% borrow-cost portfolio had deeply negative alpha, but the lending bill itself can erase the edge for actual short sellers.

This article was independently written by OneDayTrading from public reporting. Read the original (MarketWatch)