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U.S. spot Bitcoin ETFs posted about $1.29 billion in net outflows over the 12 sessions from Dec. 15 through Dec. 31.

The quiet holiday stretch became one of the cleaner stress tests yet for how “sticky” the category is when trading desks are thinly staffed, and portfolios are being squared before the calendar flips.

The moves were not evenly distributed. According to Farside, the period saw about $812 million in gross inflows across just two positive days, Dec. 17 and Dec. 30, versus about $2.10 billion in gross outflows across the rest of the window.

The tape read like a familiar year-end routine for anyone who has watched risk get trimmed into holidays. The difference is that the “marginal” push and pull now sits inside a single daily print that can swing hundreds of millions of dollars.

A sharp shift in rate expectations, tech positioning, and global risk appetite triggered a synchronized sell-off, sending equities and crypto sliding together.

That matters because large allocators have started treating spot ETFs as the primary on- and off-ramp for Bitcoin exposure. That pulls the story away from old crypto-cycle framing.

Standard Chartered has framed ETF flows as a more important driver than the halving cycle in the current regime. The approach turns “who is buying and who is redeeming” into a daily macro input rather than a niche market detail.

Over the holiday stretch, the biggest tell was that outflows were not confined to the usual legacy redemption narrative. IBIT, often treated as a core allocation vehicle, accounted for roughly half of the net outflow in the sample.

That is a different feel than a window where GBTC redemptions do most of the work on their own. It is especially notable given the fee gap between offerings.

Here is how the net flows concentrated across the period shown. The breakdown follows the same Farside convention of daily net subscriptions and redemptions:

On a day-to-day basis, the holiday period did not decline in a straight line. Dec. 17 saw a strong inflow day of about $457 million, and Dec. 30 followed with about $355 million.

Those two sessions were not enough to offset several sharp outflow days. The biggest included Dec. 15 (about -$358 million) and Dec. 31 (about -$348 million).

In plain terms, the market got two chances to reset higher on ETF demand. The rest of the window kept leaning the other way.

Price action delivered the same constrained message. Bitcoin is trading around $89,000, pinned in a narrow range amid ETF outflows that weighed on momentum.

If you translate the $1.29 billion net outflow into Bitcoin at roughly $89,000, it amounts to about 14,500 BTC in net sell pressure. It is a back-of-the-envelope figure that helps explain why a market can feel heavy even when it is not seeing panic.

Year-end can force position hygiene that has nothing to do with long-term conviction, including rebalancing after a strong quarter, risk budgeting into low-liquidity days, and closing basis trades where the math no longer works.

The reason the market is paying closer attention now is that spot ETF flows tend to concentrate execution into predictable windows. That can amplify price impact when liquidity is thinner than usual.

Kaiko has documented how ETFs changed spot market structure and intraday patterns. It is a reminder that the size of a flow is only part of the story, and timing does the rest.

Without aggregation, cohort analysis, and scaling, single-day flow stories are just noise.

Macro policy sat in the background, and December did not offer a clean handoff into 2026. The Federal Reserve kept its message centered on data dependence and the “extent and timing” of adjustments.

AP reported that the decision featured unusual dissents. That kept rates volatility in the conversation even as markets tried to read the next move.

At the same time, the dollar is heading for its steepest annual drop in years. That backdrop has often been treated as a tailwind for Bitcoin, yet it did not overpower the holiday ETF bleed.

One way to think about the next quarter is to treat December as a test of whether the category behaves like a structural allocation or a two-way trading valve.

If the holiday pressure was mostly year-end cleanup, January can bring a snapback as books reopen and institutions rebalance into targets.

If the moves were driven by rate-sensitive positioning and compressed carry, flows can stay choppy. Bitcoin can keep trading like a macro risk asset where headlines overfit daily prints.

Standard Chartered has also pointed to institutional buying arriving slower than expected.

That matters in early 2026 because it implies committee pacing and risk budgets can override a bullish narrative even when Bitcoin’s long-term pitch has not changed.

Investors also got a reminder that “core” products can still be used tactically.

For now, the cleanest fact pattern is also the simplest one: U.S. spot Bitcoin ETFs finished the Dec. 15 through Dec. 31 window with about $1.29 billion in net outflows.

The post Bitcoin ETFs failed a critical holiday stress test as $1.29 billion vanished through “tactical” positioning appeared first on CryptoSlate.

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