A mystery giant leaned on the repo window for another $25 billion after a $50 billion pull and the size screams big bank stress

Only very large institutions can tap the overnight repo window at that scale.
That means a major bank or a primary dealer needed the money.

A regular hedge fund cannot walk in and take $25 billion overnight on top of $50 billion last week. That kind of access and size belongs to big banks that act as the plumbing of the financial system.

SOFR is 20bp+ higher than IORB. It appears we have a growing liquidity problem.
https://www.newyorkfed.org/markets/reference-rates/sofr


“US financial markets show signs of strain despite calm appearances. The SOFR–IORB spread, a key dollar liquidity indicator, has surged to its highest since 2020. This means banks are paying more to borrow cash, signaling tightening liquidity. US Treasury debt issuance is draining market liquidity, creating a paradox of abundant collateral but scarce cash.”

https://economictimes.indiatimes.com/news/international/us/us-dollar-liquidity-crisis-sofr-iorb-spread-2025-hits-highest-level-since-2020-fed-warning-qe-next/articleshow/125092436.cms