Bitcoin (CRYPTO: BTC) weekly spot ETF flows turned negative for the first time in three weeks, putting the key $76,000 support level in focus ahead of the Fed decision.

Spot Bitcoin ETFs recorded $463 million in weekly outflows, removing a key source of demand that helped propel BTC from roughly $63,000 to $82,000 over the previous three weeks.

Since August, Bitcoin has been rejected around $82,000 three times but is yet to test the next major downside area around $72,000.

Wintermute Research said on Tuesday that ETF reversal adds another risk as BTC lost $3,500 without the institutional ETF demand that supported its recent rally.

Negative ETF flows prompt Wintermute to shift its crypto outlook to “neutral” from “constructive” early.

Meanwhile, Ethereum (CRYPTO: ETH) and other altcoins held up better, with spot ETH ETFs attracting $197 million in weekly inflows.

Are Macro Factors in Play?

Bitcoin remains under pressure ahead of a likely September rate hike.

With a hike largely priced in, BTC’s next move could depend on whether Fed Chair Kevin Warsh signals further tightening into 2027.

Brent crude above $105 and a two-decade high in the 10-year Treasury yield add pressure on Bitcoin.

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