Stocks finished modestly higher on Wednesday, but the relatively small gains in the major averages understated a much stronger showing across several areas of the broader market. The S&P 500 (+0.2%), Nasdaq Composite (+0.2%), and DJIA (+0.2%) advanced in unison, while the S&P 500 Equal Weighted Index (+1.0%) comfortably outperformed as rate-sensitive groups and a number of stocks with company-specific catalysts rallied.

The session got an early boost after the U.S. Department of the Treasury announced that it will at least double the size of its liquidity-support buyback operations for longer-dated nominal securities beginning September 9. The announcement provided some relief from the elevated long-term yields that have pressured equities recently and helped fuel a rebound across rate-sensitive areas of the market.

Homebuilders were among the biggest beneficiaries, with the iShares U.S. Home Construction ETF jumping 3.1%. Strength across retailers and mega-cap names provided additional support to the consumer discretionary sector (+2.1%), with Target (TGT 159.03, +6.56, +4.30%) and Lowe's (LOW 220.71, +5.07, +2.35%) advancing following their earnings reports while Amazon (AMZN 265.84, +6.39, +2.46%) and Tesla (TSLA 351.12, +14.25, +4.23%) rebounded from recent weakness.

The health care sector (+3.5%) was the clear sector leader following positive results for an experimental cancer vaccine from Moderna (MRNA 174.38, +111.42, +176.97%) and Merck (MRK 152.22, +17.05, +12.61%). Moderna more than doubled in value and Merck posted a double-digit gain, helping send the iShares Biotechnology ETF up 6.6%.

The materials sector (+1.7%) was another standout as higher precious metals prices supported Newmont Corporation (NEM 125.08, +9.10, +7.85%) and other mining stocks.

Seven S&P 500 sectors ultimately finished higher, highlighting the broad participation beneath the relatively modest gains in the headline averages. That divergence was largely a product of continued weakness across semiconductor stocks. The PHLX Semiconductor Index fell 2.1%, extending yesterday's steep decline and weighing heavily on the information technology sector (-0.7%). Semiconductor-related electrical equipment names also remained under pressure, contributing to the industrials sector's (-0.9%) underperformance.

The afternoon release of the FOMC minutes provided a reminder that additional monetary tightening remains a possibility. Most participants supported keeping rates unchanged at the latest meeting, though several favored a 25-basis-point increase and many judged that further tightening would likely be necessary if inflation fails to decline. Stocks also absorbed another increase in oil prices. WTI crude settled $0.80 higher (+0.9%) at $85.68 per barrel, continuing its recent climb but failing to derail the broader advance.

Wednesday's session ultimately featured a notable broadening in participation following the technology-driven weakness earlier in the week. Rate-sensitive stocks, health care, materials, and several earnings-related movers provided strong leadership, allowing the equal-weight S&P 500 to substantially outperform even as another sharp decline in semiconductor stocks kept the headline averages' gains relatively modest.

U.S. Treasuries had a mixed showing on Wednesday, as the 10year and 30-year note yields added to their gains from Tuesday while shorter tenors finished flat after retreating from a higher start. The 2-year note yield finished unchanged at 4.18%, and the 10-year note yield settled down five basis points to 4.65%. 

• Russell 2000: +22.2% YTD
• S&P Mid Cap 400: +16.3% YTD
• Nasdaq Composite: +13.3% YTD
• S&P 500: +12.6% YTD
• DJIA: +11.2% YTD

Reviewing today's data:

• The weekly MBA Mortgage Index was down 0.4% after rising 3.6% a week ago. The Purchase Index was down 2.0% while the Refinance Index rose 1.5%.