Which ETF flows moved the market?

TLDR

The flows that moved the market were US spot Bitcoin ETF prints: heavy late?December outflows followed by a sharp net inflow that broke a seven?day streak, notably with IBIT and ARKB turning positive on 31 Dec per a market update.

1. Bitcoin ETFs flipped to a $355 million net inflow on 31 Dec, after persistent outflows all week per the report above.
2. Ethereum ETFs also reversed multi?day outflows, with $67.8 million net inflows on 30 Dec per a summary.
3. Rotation into altcoin ETPs continued, with XRP and SOL products posting the strongest weekly inflows amid majors outflows per coverage.

Deep Dive

1. Bitcoin ETF Reversal

US spot BTC ETFs saw sustained outflows through late December, then a clean reversal to a $355 million net inflow on 31 Dec, led by IBIT and ARKB, which helped stabilize price action despite holiday?thin liquidity as noted above.

• Earlier sessions showed IBIT net redemptions, including a daily $192.61 million outflow, highlighting how single?issuer prints can amplify market tone in low?liquidity windows per a notice.
• Over the past week, overall crypto funds logged $446 million net outflows, with BTC products losing $443 million, underscoring the late?year de?risking regime per analysis.
• Context: BTC ETF AUM hovered around 116.69 B over the past week (tool output), signaling size remains substantial even as flows oscillate.

2. Ethereum ETFs Turning Positive

ETH ETFs also broke a multi?day outflow streak, printing $67.8 million net inflows on 30 Dec, after a period of consistent redemptions tied to year?end rebalancing and thin liquidity per the summary above.

• ETH products had $59.5 million weekly outflows into 29 Dec as institutional desks trimmed exposure during holiday trade per coverage.
• AUM context: ETH ETF AUM sat near 17.1 B (tool output), smaller than BTC, so single?day prints can swing tone but typically with less market?wide impact.

3. Altcoin ETP Rotation

Even as BTC/ETH saw net outflows, altcoin ETPsespecially XRP and Solana (SOL)attracted steady capital, posting the strongest weekly inflows and showing selective risk?on behavior away from majors per reporting.

1. XRP ETPs posted $70.2 million weekly inflows and have recorded no outflow days since launch, signaling durable demand as above.
2. SOL ETPs added $7.5 million weekly inflows and roughly $750 million cumulative since debut, pointing to continuing interest despite broader de?risking as above.
3. TradeFi desks flagged that late?year liquidity compression amplified the signal from ETF prints, keeping BTC range?bound even when flows flicked positive per this note.

Conclusion

ETF flows drove the recent chop: majors faced late?December outflows, then BTC and ETH flipped positive for a session, while alt ETPs (XRP, SOL) kept attracting capital. The net effect was stabilization rather than breakouts as holiday liquidity stayed thin. If daily inflow streaks resume across BTC and ETH, breadth and momentum could improve; persistent outflows would keep rallies capped even as selective alt rotations continue.