Leveraged funds rebuilt a net short position of 1,668 BTC across four regulated Bitcoin futures markets in the week to Sept. 8, according to CFTC data. The BTC-normalized aggregate widened to 39,876 BTC net short from 38,208 BTC a week earlier, covering CME’s standard and micro Bitcoin futures plus Coinbase Derivatives’ nano and nano perpetual-style contracts.
CME’s five-BTC contract drove most of the shift. Funds added 888 short contracts and 616 long contracts there, widening the net short by 272 contracts, or 1,360 BTC, equal to 81.5% of the combined weekly change. Across all four contracts, short exposure rose by 4,965 BTC while long exposure increased by 3,296 BTC, indicating more complex positioning than a simple bearish bet.
The CFTC notes that leveraged funds include hedge funds, commodity trading advisers, commodity pool operators and other money managers. A short futures position can hedge a long spot or spot ETF holding, and CME has described such structures as basis trades designed to capture the futures-spot spread. This means the data cannot prove traders made an unhedged wager on a post-Fed Bitcoin decline.
Separately, Federal Reserve data showed domestic hedge funds expanded gross balance sheets during the second quarter. Gross asset value climbed from $2.7857 trillion to $3.1859 trillion, a $400 billion increase. Securities sold short rose from $651 billion to $799 billion, and margin loans due to U.S. security brokers and dealers increased from $110 billion to $131 billion.
The FOMC is scheduled to meet Sept. 15–16, with a Summary of Economic Projections. A surprise in rates or policy outlook could reprice Treasury positions and collateral, forcing leveraged portfolios to raise cash in liquid markets. The Fed’s May Financial Stability Report said hedge-fund leverage was at or near all-time highs, while a separate Fed study estimated large qualifying funds had $4 trillion of gross Treasury exposure and $3 trillion of repo cash borrowing in September 2025. Bitcoin was trading near $77,300 on Sept. 12, putting the expanded short positioning in place before the Fed meeting. Until tighter secured funding or visible cross-asset selling appears, the data show amplification capacity rather than an actual Bitcoin sale.
