PFF Borrow Costs Spike as Shorts Quietly Rebuild

PFF — the iShares Preferred and Income Securities ETF — enters August with a curious internal tension: the stock has drifted gently higher while its borrow market has quietly tightened and short interest has rebounded sharply off multi-month lows.

The most striking data point this week is not the price. Cost to borrow has jumped 21% over the past week to 2.13%, after spending most of July collapsing from an extraordinary one-day spike of 32.2% on July 1 — a reading that dwarfs anything else visible in the 30-day history. That July 1 anomaly has faded, but the directional trend since mid-July is clearly back toward tighter borrow conditions. The cost hit a trough near 1.30% on July 27 and has climbed steadily since, suggesting renewed demand for the short side.

Short interest tells a more nuanced story here. At 1.04% of the free float, the short position is modest by any standard — this is not a heavily contested ETF. But the week-on-week move is notable: short shares rose nearly 10% over the past week to around 4.76 million, reversing a sustained unwind from late June when short interest ran above 10 million shares. The full picture from the 30-day history is striking — SI more than halved over a single month, falling from roughly 10.7 million shares on June 30 to a trough near 3.9 million on July 29, before rebuilding this week. Shorts appear to have exited aggressively through July and are now modestly re-engaging. Availability, at 141.5% of short interest, remains healthy — there is no squeeze pressure developing — and the 52-week low availability reading of just 0.49% (from earlier in the year) is a distant memory for now.

Options positioning adds a layer of context. PFF options traders have maintained a persistently heavy put bias — the put/call ratio is running at 2.03, close to its 20-day average of 1.97 and well above what you would typically see on an equity index ETF. The z-score is a modest 0.36, meaning this is not an unusual reading relative to recent history; rather, the consistently elevated ratio reflects the structural character of PFF's options market, where income-oriented holders routinely buy downside protection. The 52-week range on PCR spans 0.62 to 2.84, so the current reading lands in the middle — cautious but not alarmist.

The income angle remains the fundamental anchor for this ETF. Monthly dividends have been arriving with consistency: the most recent payment of $0.142 per share on August 3 continues a run of five consecutive monthly distributions hovering between $0.138 and $0.142, implying an annualised yield close to 5.5% on the current price of $30.73. That income stream is the reason the holder base skews heavily toward wealth managers and advisory channels — Morgan Stanley, Merrill Lynch, Wells Fargo, and LPL Financial collectively represent the largest disclosed positions, with none holding more than 3.2% of shares. The ownership profile is fragmented and income-driven, not tactical. BlackRock added 338,284 shares in the quarter to June 30, a modest but notable increase from the sponsor's own related asset management arm.

What to watch next is the trajectory of the borrow cost and whether the short rebuild continues — if June's episode of near-zero availability and a briefly spiked CTB of 32% has any structural echo, the path from "normal" back toward "constrained" lending conditions is worth tracking against the backdrop of financial-sector preferred issuance and any movement in longer-dated rates.