According to the source, Harvard Management Company's Q3 2025 Form 13F-HR filing shows the endowment held about $443 million of iShares Bitcoin Trust (IBIT), its largest declared U.S. equity position in the report, per SEC EDGAR. The Q3 filing indicates the IBIT stake is roughly triple the size reported in the prior Q2 2025 Form 13F-HR, per SEC EDGAR filings. The filing identifies the position as iShares Bitcoin Trust units (ticker IBIT), providing indirect BTC exposure via BlackRock's spot Bitcoin ETF, per SEC EDGAR.

According to @EricBalchunas, markets saw a broad cross-asset selloff with SPY -1.5%, IWM -2.9%, IBIT -3.2%, GLD -0.75%, TLT -0.74%, and SHY -0.06%, indicating weakness even in short-term Treasuries; source: @EricBalchunas on X, Nov 13, 2025. IBIT’s larger decline than SPY shows Bitcoin exposure lagged large-cap equities on the day, while small caps underperformed via IWM; source: @EricBalchunas on X, Nov 13, 2025. For crypto traders, the session demonstrated risk-off pressure hitting Bitcoin-linked instruments such as IBIT alongside equities and bonds; source: @EricBalchunas on X, Nov 13, 2025.

According to @rovercrc, BlackRock now holds 749,000 BTC; this claim should be verified against BlackRock’s iShares Bitcoin Trust daily holdings disclosures or SEC filings before trading, source: @rovercrc; BlackRock iShares Bitcoin Trust disclosures; SEC filings. If accurate, accumulation on this scale would reduce freely tradable supply and can tighten spot liquidity while lifting BTC futures basis and funding during ETF inflow surges, source: @rovercrc; BlackRock iShares Bitcoin Trust disclosures; CME Group data. Traders should look for confirmation via net US spot Bitcoin ETF inflows, IBIT share creations, BTC order book depth, and spot-futures spread behavior before positioning, source: @rovercrc; BlackRock iShares Bitcoin Trust disclosures; major exchange order books; CME Group.