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Bitcoin and Ether exchange traded funds have recorded extended net outflows since November.
Analytics firm Glassnode said the trend points to reduced institutional participation.
The thirty day moving average of ETF flows has turned decisively negative.
The data covers United States spot Bitcoin and Ether ETFs.
Glassnode described the pattern as partial institutional disengagement.
Analysts linked the trend to broader liquidity contraction across crypto markets.
ETF flows typically lag movements in underlying spot markets.
Bitcoin and Ether prices have trended lower since mid October.
ETFs are widely viewed as a barometer of institutional sentiment.
Institutional demand was a key driver earlier in the year.
That support appears to have weakened as markets cooled.
Coinglass reported four consecutive days of net Bitcoin ETF outflows.
Aggregate ETF flows have remained negative across multiple sessions.
Some exceptions emerged among the largest funds.
BlackRock’s iShares Bitcoin Trust recorded modest inflows recently.
Market commentary suggested selling pressure has returned.