U.S. spot Bitcoin ETFs saw significant outflows on Tuesday, totaling $287.78 million, marking the largest negative flows since May.  Grayscale's GBTC and Fidelity's FBTC led the outflows, while BlackRock's IBIT recorded no new inflows.  The outflows occurred amid a broader market selloff triggered by weaker U.S. ISM data.  Spot Ethereum ETFs also experienced outflows, with Grayscale's ETHE leading the decline.  Source: The Block