According to @EricBalchunas, BlackRock holds 30% of the US ETF market, maintaining a 1% lead over Vanguard at 29% (source: Eric Balchunas on X, Dec 23, 2025). He reports both issuers increased market share by 0.2% this year (source: Eric Balchunas on X, Dec 23, 2025). He also notes the gap to third and fourth place is very large (source: Eric Balchunas on X, Dec 23, 2025). The post does not reference crypto ETFs or direct crypto market impact (source: Eric Balchunas on X, Dec 23, 2025).