A large and unusually timed bet hit the U.S. Treasury market just before the Treasury Department announced an expansion of its buyback program. According to BlockBeats, the Pimco 25+ Year Zero Coupon U.S. Treasury Index ETF, traded under the ticker ZROZ, recorded $123 million in net inflows on Tuesday, the biggest single-day inflow in the fund’s history. The ETF, which has about $1.5 billion in assets, also saw trading volume rise to 5.2 million shares, nearly double its previous 2024 peak. ZROZ holds STRIPS, or Separate Trading of Registered Interest and Principal of Securities, which are zero-coupon instruments created by splitting Treasury principal and interest payments. Because the fund carries an effective duration of about 28 years, it is highly sensitive to moves in long-end yields. In theory, a 1 percentage point decline in yields would translate into an about 28% gain in bond prices. The fund rose 3.2% on Wednesday, marking its biggest one-day advance since November 2024.

Jane Street suffered roughly $15 billion in losses in July, according to multiple media reports, a hit that would mark its first monthly loss in about a decade if confirmed. The setback was tied to the collapse of AI-focused hedge fund Situational Awareness, in which Jane Street had invested, as well as losses on long positions in Asian non-AI stocks and a broader selloff in AI, semiconductor and other technology shares. Internal memos cited by Reuters said some of the firm’s biggest AI-linked holdings, including storage chip and semiconductor names, fell by about 50% in July. Jane Street told staff that many of the losses came from the same basket of trades that had generated strong outperformance in the second quarter. Even after the July drawdown, Bloomberg and Reuters reported that the firm’s net trading revenue for the year still exceeded $40 billion, above its record full-year 2025 figure of $39.6 billion. The losses surfaced as Jane Street was also working on a roughly $14.6 billion refinancing led by JPMorgan, with Pimco, Capital Group and Fidelity participating. The deal would replace parts of its public-market debt with private financing, a shift the Financial Times said reflects the firm’s willingness to accept higher funding costs in exchange for less public disclosure. Jane Street has also said it closed a substantial portion of the exposures that drove the July losses and cut risk in other strategies.

Jane Street disclosed a roughly $15 billion loss for July after its investment in AI-focused hedge fund Situational Awareness was hit by a sharp pullback in U.S. AI stocks, according to the Financial Times. The figure was revealed to creditors as part of the firm’s financial disclosures tied to a private debt financing deal worth about $14.6 billion. JPMorgan is leading that transaction, which includes shifting about $11 billion of public debt to private investors, including Pacific Investment Management Co. (Pimco). Situational Awareness, founded by former OpenAI employee Leopold Aschenbrenner, had made concentrated and highly leveraged bets on AI stocks. As the market reversed in July, the fund suffered heavy losses and was forced to sell part of its public equity positions to Citadel. Despite the one-month hit, Jane Street has remained highly profitable in recent years. Data cited in the report showed record net trading revenue of $16.1 billion in the first quarter of 2026 and about $40 billion for full-year 2025. The report said the loss was unusual for a proprietary trading firm known for keeping a low profile while holding a major position in global markets.

Federal Reserve Chair Warsh is heading into a critical stretch, with two inflation readings due over the next month likely to shape whether officials raise rates in September or stay on hold. Nick Timiraos, the Wall Street Journal reporter often seen as a closely watched Fed chronicler, wrote that Warsh has made lower inflation the centerpiece of his tenure, but a vague press conference after the July meeting raised fresh doubts about whether he is willing to follow tough rhetoric with action. Economists expect July core CPI to rise 0.2% month over month, a level Timiraos described as broadly consistent with the Fed’s 2% inflation goal. A hotter reading would increase pressure on Warsh, especially with core inflation in the Fed’s preferred gauge already at 3.3% in June, up from 2.8% a year earlier. The article also points to growing internal strain: several voting members have publicly signaled they could back a rate hike if inflation does not improve, and some officials moved after the July meeting to clarify policy logic that Warsh did not clearly lay out himself.

Jane Street is negotiating with investors including Pimco on a private credit deal that would move roughly $11 billion of its debt from public markets into a private vehicle, according to the Financial Times. The transfer is intended to reduce quarterly disclosure requirements tied to a large group of creditors while giving the firm more flexibility to invest in AI infrastructure such as data centers.

Meta is considering a stock offering worth tens of billions of dollars to support AI infrastructure spending, according to the Financial Times, as Big Tech funding needs keep rising after Alphabet’s $85 billion deal.

Fitch said private credit defaults rose to 9.2% in 2025, with smaller borrowers seeing a 15.8% default rate. Losses remain limited due to restructurings and strong recoveries, but redemption pressure and liquidity mismatch are emerging as key risks.

Pimco says prolonged conflict involving Iran could disrupt energy supplies, lift inflation, and force the Federal Reserve to consider rate hikes instead of cuts. Treasury yields have already moved higher as markets reassess the policy outlook.