Bitcoin ETFs Rebound from Worst Day Since June Amid Regulatory Uncertainty

US spot Bitcoin ETFs experienced their worst day since June as investors reduced risk exposure during a volatile week. On September 15, they saw sharp reversals with net outflows of about $450 million.

This decline was triggered by several factors, including regulatory and macroeconomic uncertainty. The Senate CLARITY Act vote added to the market's uncertainty, overlapping with a period of volatility for Bitcoin and ETFs.

Falling prices often encourage investors to reduce exposure during uncertain periods. This strengthened the relationship between Bitcoin ETF flows and Bitcoin price as negative momentum pushed holders toward short-term risk reduction.

However, strong inflows later in the week reversed most of the damage, with about $433 million in net inflows on September 18. Fidelity's FBTC and BlackRock's IBIT led both the sell-off and subsequent rebound.