Small-caps outperform as mega-cap tech slips

Small-cap stocks outpaced large-cap benchmarks on Tuesday, with the iShares Russell 2000 ETF (IWM) closing up 1.66% at $275.78, versus a 0.34% gain in the S&P 500 and a 0.10% decline in the Invesco QQQ Trust (QQQ) to $717.63, according to Finnhub data.

The divergence was driven by weakness across mega-cap technology names. Meta Platforms (META) fell 1.59% to $694.25, Alphabet (GOOGL) dropped 1.13% to $340.27, Apple (AAPL) declined 1.00% to $339.50, Microsoft (MSFT) slipped 0.31% to $531.87, and Nvidia (NVDA) eased 0.29% to $216.47. Tesla (TSLA) was the outlier among the six largest Nasdaq-100 constituents, rising 1.54% to $373.71. Amazon.com (AMZN) was roughly flat, up 0.07% to $262.63.

No Federal Reserve statement, earnings release, or macroeconomic data print accompanied the moves, according to the observed feed. Finnhub's earnings calendar showed no reports due from the affected mega-cap names until next week at the earliest, with a cluster of smaller-cap names — including Applied Industrial Technologies (AIT) and Arch Capital Group (ACGL) — scheduled to report October 27.

Separately, Hacker News discussion volume centered on Google's open-source release of TorchTPU, a native PyTorch backend for its TPU hardware (290 points), and a benchmark report showing performance regression in Anthropic's Opus 5.5 model relative to a competing release called Astra (203 points). Neither item carried a direct read-through to the day's equity moves in the observed data.