Bitcoin opened the session at $78,181.33 and slid steadily through the morning to reach $76,931.56 before settling near $76,401 by midday, a 2.59% drop over 24 hours.

Ethereum followed a similar path, opening at $2,515.17 and falling to $2,480.37 before trading at $2,442.08, down 2.61%.

The moves left both assets near the lower end of their recent ranges with total crypto market capitalization at $2.63 trillion.

The session unfolded against a backdrop of elevated positioning ahead of the September 16 FOMC meeting. Markets had already priced a 92.5% probability of a rate hike, and the 10-year Treasury yield pushed above 5% as inflation concerns resurfaced.

At the same time the Senate prepared a procedural vote on the CLARITY Act that required 60 votes, adding a layer of regulatory uncertainty to an already sensitive tape.

The Setup

Bitcoin had consolidated around the $78,250 level earlier in the day while defending the $76,000-$77,000 band.

Spot Bitcoin ETFs recorded $256 million in net outflows over the prior five sessions, while Ethereum ETFs attracted $342 million in inflows, including $121 million on September 14.

Total crypto market capitalization stood near $2.68 trillion after declining 1.1% over the preceding week.

These flows and the macro backdrop created a clear asymmetry. Bitcoin carried more downside pressure from ETF redemptions and the hawkish rate odds, while Ethereum benefited from relative strength in its ETF channel. Traders positioned defensively with the Fed decision less than 24 hours away.

The ETF outflow reading for Bitcoin transmitted directly into reduced risk appetite by forcing market makers to hedge shorter delta, while the Ethereum inflow figure supported leveraged long positions in that asset and eased pressure on the dollar through narrower funding spreads.

The Move in Detail

The 3.43% weekly loss left the asset below $80,000. Ethereum traded close to $2,500 for much of the session before joining the broader risk-off move.

Volume remained elevated relative to the prior quiet period, consistent with pre-event repositioning rather than a liquidation cascade. No single level acted as a hard floor; price simply drifted lower on steady selling pressure tied to the rate-hike odds and ETF outflows.

The weekly decline figure meant deleveraging had already begun before the catalyst, transmitting through lower margin buffers that left positions vulnerable to any further dollar strength once the hike probability was confirmed.

Reading the Volatility

The session showed contained rather than explosive volatility. Bitcoin remained within its recent range from open to low, reflecting compression ahead of the catalyst rather than a breakout. Cross-asset behavior was aligned, with both majors posting nearly identical percentage declines.

The contrast between Bitcoin ETF outflows and Ethereum ETF inflows highlighted divergent positioning within the same macro environment. Traders appeared to favor relative value in Ethereum while reducing net exposure to Bitcoin ahead of the FOMC outcome.

That alignment in percentage terms indicated the liquidity drain from the hike odds affected the broader complex evenly, limiting opportunities for basis trades and keeping leverage ratios compressed across venues.

What Comes Next

With the FOMC, Summary of Economic Projections and dot plot scheduled for September 16 at 2:00 PM ET, the immediate focus remains on whether the 92.5% hike probability holds or shifts after the decision.

Import Prices, Export Prices, Retail Sales and Retail Sales Ex Autos are also due at 8:30 AM ET on the same day, adding further data points.

Traders will watch whether Bitcoin can reclaim recent highs or if further weakness develops should the Fed signal remain hawkish. Options markets are likely to see elevated activity as the market digests the combined policy and legislative developments.

The hike probability priced into the market already reflected expectations for tighter liquidity that would strengthen the dollar and compress risk assets, so any confirmation would likely extend the recent range compression rather than trigger fresh liquidation.