According to @CoinMarketCap, Nasdaq ISE asked the U.S. SEC to raise both position and exercise limits on options for BlackRock’s iShares Bitcoin Trust (IBIT) to 1,000,000 contracts from 250,000, a 300% increase (source: @CoinMarketCap). For traders, the filing highlights a potential expansion in allowable single-entity exposure and capacity in IBIT options if approved, which is directly relevant for BTC-linked derivatives positioning and liquidity management (source: @CoinMarketCap). Monitor the SEC review and IBIT options metrics such as open interest, volume, and spreads for any liquidity shifts tied to this requested limit change (source: @CoinMarketCap).

According to @santimentfeed, a combined net inflow of $5.17B has moved into Bitcoin ETFs since late September, coinciding with BTC reaching a $125.8K all-time high on Monday, source: Santiment post on X dated Oct 8, 2025 and Santiment Bitcoin ETF net inflow/outflow dashboard. According to @santimentfeed, $2.83B of these inflows came from BlackRock iShares Bitcoin Trust (IBIT) over the last six trading days, source: Santiment post on X dated Oct 8, 2025. According to @santimentfeed, institutional money is a key proponent of crypto markets moving toward historical levels, source: Santiment post on X dated Oct 8, 2025. Traders can monitor aggregate ETF net flows and IBIT contributions via the Santiment Bitcoin ETF flows dashboard to track institutional participation, source: Santiment Bitcoin ETF net inflow/outflow dashboard.

According to @EricBalchunas, Harvard and Brown endowments have purchased BlackRock’s IBIT spot Bitcoin ETF, providing institutional BTC exposure via an ETF vehicle (source: @EricBalchunas). Harvard is the 29th largest IBIT holder out of 1,300 reported holders, indicating a relatively sizable allocation among institutions (source: @EricBalchunas). Endowments are among the hardest institutions to engage and rarely buy ETFs, highlighting the significance of these allocations for institutional adoption signals in BTC markets (source: @EricBalchunas). For trading, participants tracking institutional demand may monitor IBIT holder rankings and count as referenced by @EricBalchunas to gauge continued endowment participation in spot BTC ETFs (source: @EricBalchunas).