Berkshire Short Interest Keeps Rising, Borrow Stays Effortless

Short interest in BRK.A has climbed nearly 76% since early October, yet the borrow market remains one of the most frictionless in the US large-cap universe, a split that frames Thursday's Q3 results in an unusual way.

The short count has accelerated through October. From roughly 150 A-share equivalents in early October, it reached 263 by October 30, a 23% monthly gain and a 16% rise over the past week alone. That build continued through the week before the print, adding to the move first flagged in Monday's report when the weekly gain crossed 10%. Despite the pace, the absolute level is still negligible: official FINRA data puts the fortnightly settlement count at 155 shares with a days-to-cover of just one day, confirming this is a thin short book rather than any kind of crowded trade.

The borrow market reinforces that picture. Availability has stayed at its maximum measurable reading throughout October, with shares available to borrow vastly outnumbering those already borrowed. Cost to borrow ticked up to 0.47% on October 30, a small move in the context of a month that opened above 1.5%. There is no squeeze pressure, no tightening of lending conditions, and no evidence that the rising short count reflects forced demand rather than deliberate positioning.

The analyst picture is divergent and worth sizing carefully. UBS raised its target to $942,405 on October 22, the most recent change on record, maintaining a Buy. That target sits roughly 13% above the current price of $834,641. Keefe, Bruyette and Woods sits at the opposite end, holding an Underperform with a $735,000 target, well below where the stock is trading. The consensus mean of $808,601 is actually below the current price, a reminder that the stock's 10.6% gain over the past month has outrun most Street models. Berkshire's EPS surprise factor score ranks in the 93rd percentile, meaning it has a strong track record of beating estimates, but the forward EPS momentum score has slipped, with the 30-day reading now negative.

Greg Abel's early capital allocation decisions remain the qualitative angle. Wikipedia attention for Berkshire registered a z-score of 2.1 against its own 90-day history as of early October, the highest retail-attention reading in that window, pointing to elevated public interest in the company at a moment when the succession dynamic is still being assessed by the market. That attention is not a financial signal, but it frames the audience around Thursday's print.

Berkshire's past two Q3 reports produced a one-day gain of 1.8% and a one-day loss of 3.8% respectively, with five-day drifts of roughly minus 4% to minus 5% in both cases. The print on November 6 is therefore less a test of whether Berkshire's businesses are growing and more a test of how the market reads Abel's first full quarter in charge, against a stock that has already re-rated sharply higher and now trades above the analyst consensus.