The Federal Reserve cut the target range for the federal funds rate by 25 bps to 3.50% to 3.75% at the December 9 to 10, 2025 FOMC meeting, and framed next steps as data dependent while assessing the “evolving outlook” and “balance of risks.” In the same month, inflation data arrived with unusual gaps because the government shutdown disrupted collection and publication: the BLS CPI release for November 2025 reported headline CPI +2.7% y/y and core CPI +2.6% y/y, and explicitly noted that month to month CPI changes were not published because October data could not be collected retroactively. Labor market data also reflected the disruption but still provided a clear directional read: the BLS reported nonfarm payrolls +64,000 in November, with unemployment at 4.6% (and October household survey data not collected).  For rates and USD liquidity expectations into year end, the key macro takeaway in December was a combined signal of a lower policy ceiling after the Dec 10 cut, disinflation continuing on a y/y basis in the CPI release, and softer, noisier labour indicators due to data interruptions, which tends to widen the range of plausible outcomes markets must hedge. 

What changed versus November is that December’s market pricing had to digest policy and macro signals while short term funding conditions visibly tightened around quarter end. On December 29, 2025, banks borrowed $25.95 billion at the Fed’s standing repo facility (the Reuters report describes this as the third highest usage since 2021), a reminder that year end balance sheet constraints can matter even when the policy rate is moving down. The same Reuters report also said the Fed had ended balance sheet runoff and started buying short dated Treasuries, and had removed a daily cap on the repo facility, changes that speak directly to how cleanly reserves circulate through the system into year end. For digital assets, the practical implication is that December’s risk appetite was shaped by a two speed backdrop, easier headline policy at the margin (lower fed funds range) alongside episodic USD funding tightness around reporting dates, which typically increases the value of liquidity aware positioning, tighter risk limits, and cleaner hedging structures into January. 

US market access signals shifted toward clearer operating rails for intermediaries, especially around derivatives collateral and stablecoin issuance. On Dec 8, 2025, the CFTC’s Market Participants Division issued Letter No. 25-40, a staff no-action position that, subject to conditions, addresses when an FCM may accept certain non-securities digital assets, including payment stablecoins, as customer margin collateral and how those assets are treated for specified regulatory purposes. The same day, the CFTC issued Letter No. 25-41, withdrawing Staff Advisory 20-34 on accepting customer virtual currencies into segregation, and the Commission also withdrew its prior “actual delivery” interpretive guidance for certain retail crypto transactions, with the withdrawal described as effective Dec 10, 2025 and announced via a Dec 11 CFTC press release. 

BITCOIN (BTC)

Bitcoin opened December at $90,373.90 on December 1, 2025 and closed at $87,501.88 on December 31, 2025, which corresponds to an about -3.18% month return using those daily open and close prints. The month’s intraday range was set early: the intramonth high was $98,909.40 on December 3, while the intramonth low was $83,800.00 on December 1. In practical terms, December read as a wide early range followed by a slower grind into year end, a pattern that often shows up when liquidity is thinner and participants prefer to manage risk through hedges and rebalancing rather than directional adds. 

In the US spot BTC ETF channel, late-December flows skewed negative even while AUM stayed large. The largest inflow in the window shown is +$457.29M on Dec 17, 2025, and the largest outflow is -$357.69M on Dec 15, 2025. The month ended with a sharp redemption print of -$348.10M on Dec 31, 2025, and on that same Dec 31 Total Net Assets (USD) of $113.29B, Cumulative Total Net Inflow (USD) of $56.61B, and Total Value Traded (USD) of $2.83B. The turn-of-month whipsaw is explicit: Dec 30 printed +$355.02M with Total Net Assets $114.44B and Total Value Traded $3.57B, then Dec 31 flipped to -$348.10M, while Dec 29 was only -$19.29M with Total Net Assets $113.07B and Total Value Traded $2.27B. This implies that December’s marginal flow turned into a headwind into year end, but the wrapper’s scale, shown by $113.29B of net assets at month end, meant daily creations and redemptions could still have an outsized impact on short-term pricing and hedging demand. 

ETHEREUM (ETH)

Ethereum opened December at $2,991.65 on December 1 and closed at $2,966.98 on December 31, for a monthly return of about -0.82%. The month’s intramonth high was $3,477.44 on December 10, while the intramonth low was $2,716.35 on December 1. Price action was therefore not a simple trend month, it was a down, spike, and retrace profile, where the close ended near the open despite large dispersion inside the month. 

US spot Ethereum ETF flow data was negative on net in December. Summing daily totals, gives a December net flow of about -$616.3M, and the week-by-week profile shows the pressure concentrated mid-month, with Dec 15–19 at about -$643.9M after a brief positive patch in Dec 8–12 at about +$209.1M. Spot ETH ETF history data shows the largest single-day redemption prints in the visible December window were -$224.78M on Dec 15 and -$224.26M on Dec 16, while the month ended with -$72.06M on Dec 31 after a rebound day on Dec 30 (+$67.84M) and a near-flat print on Dec 29 (-$9.63M). The largest inflow day shown in that window was Dec 22 (+$84.59M). At month end, Total Net Assets of $17.95B and Cumulative Total Net Inflow of $12.33B on Dec 31, 2025, with $808.11M of total value traded that day.