U.S. spot Bitcoin ETFs experienced net outflows of $127.12 million despite a market rally.BlackRock's IBIT had the largest outflows at $89.71 million, followed by Grayscale's GBTC at $33.8 million.Bitwise's BITB was the only fund with positive inflows of $6.71 million.Investor sentiment and concerns about regulatory overhangs may be driving the outflows.