Inflation Cools, Sentiment Pops — ETF Rally On The Cards For These Themes?

Fresh U.S. economic data is giving ETF markets a cleaner setup heading into next week’s Federal Reserve decision, with cooling inflation and a sharper-than-expected rebound in consumer sentiment reviving hopes for a December rate cut.

The mix of softer core inflation and better sentiment has pushed ETF investors toward familiar themes.

Lower rate expectations boost equity segments most sensitive to discount-rate shifts. Large-cap growth plays, including Invesco QQQ Trust (NASDAQ:QQQ) and Vanguard Growth ETF (NYSE:VUG), stand to benefit if the Fed signals a friendlier policy path. Both the funds inched up on Friday.

Higher rates have been punishing for smaller companies with higher refinancing needs — but a policy pivot could flip that script. The iShares Russell 2000 Growth ETF (NYSE:IWO) and Vanguard Russell 2000 Growth ETF (NASDAQ:VTWG) become far more compelling if borrowing costs start easing. Add the rebound in younger consumers’ expected personal finances, and you have a demographic that typically supports smaller, faster-growing firms. It's not a full-blown rotation yet, but small-cap growth is inching back onto watchlists.

A potential rate cut could lift discretionary ETFs like State Street Consumer Discretionary Select Sector SPDR ETF (NYSE:XLY) and Vanguard Consumer Discretionary Index Fund ETF (NYSE:VCR) as borrowers gain breathing room, while consumer staples ETFs like State Street Consumer Staples Select Sector SPDR ETF (NYSE:XLP) may lose some of its defensive shine.

All this is unfolding with the S&P 500, tracked by the Vanguard S&P 500 ETF (NYSE:VOO), hovering just 0.2 percentage points below record highs. If the Fed follows through next week, ETF markets may be the first to celebrate.

Also Read: This Russell 2000 ETF Pulled In $3B — Is A Small-Cap Rally On Deck For 2026?

The Numbers Behind The Scene

With the CME FedWatch tool now assigning an 87.2% probability of a quarter-point move, ETF investors might already be shifting their positioning.

The belated September Personal Income and Outlays report showed headline PCE rising 2.8% year over year, exactly in line with forecasts and the highest since August 2024. Core PCE – the Fed's preferred reading – eased from 2.9% to 2.8%, while monthly core prices climbed a modest 0.2%. Consumer spending rose 0.3% with energy and utilities leading the gains.

Early December University of Michigan data added another layer of optimism: consumer sentiment ticked up from 51.0 to 53.3, supported by a striking 13% jump in younger Americans’ expected personal finances. Inflation expectations cooled too, with one-year readings falling to 4.1%, the lowest since January.

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