Market-reference ETFs Slip as Breadth Turns Negative on Oct. 23
On Oct. 23, market-reference ETFs declined and decliners outnumbered advancers across the NYSE, American Stock Exchange and Nasdaq-listed stocks. Micron and Nvidia led individual-company turnover, while Bloom Energy fell sharply on elevated volume and CrowdStrike advanced strongly.
Market at a glance
The SPDR S&P 500 ETF Trust (SPY), which tracks the S&P 500, fell 0.52% to $759.97. The Invesco QQQ Trust (QQQ), which tracks the Nasdaq-100, slipped 0.01% to $704.40, while the SPDR Dow Jones Industrial Average ETF Trust (DIA), which tracks the Dow Jones Industrial Average, declined 1.24% to $521.37.
Breadth was negative across all three reported exchanges. NYSE-listed stocks recorded 974 advancers, 1,681 decliners and 184 unchanged issues, with an average change of -0.28%. American Stock Exchange-listed stocks recorded 1,333 advancers, 3,281 decliners and 166 unchanged issues, with an average change of -0.21%. Nasdaq-listed stocks recorded 1,770 advancers, 2,880 decliners and 618 unchanged issues, with an average change of -0.55%.
Market leaders
Micron Technology (MU) rose 2.46% to $877.55 on $18.65 billion in turnover and volume of 21.25 million shares. Nvidia (NVDA) fell 0.59% to $210.96 on $16.92 billion in turnover and volume of 80.19 million shares. Both were selected as market leaders by turnover.
Issue stocks
Bloom Energy (BE) fell 11.24% to $193.30, with volume of 36.02 million shares—2.52 times its 20-day average—and turnover of $6.96 billion. Western Digital (WDC) declined 2.97% to $343.67 on volume of 13.95 million shares, or 1.47 times its 20-day average; its five-day change was 3.52%. CrowdStrike (CRWD) advanced 8.25% to $257.57 on volume of 13.40 million shares, or 1.61 times its 20-day average. Its five-day change was 13.27%.
Notable SEC filings
Bloom Energy Corp submitted a 10-Q filing dated Oct. 22, 2026, with a report date of Sept. 29, 2026, and an 8-K filing dated Oct. 22, 2026, with a report date of Oct. 21, 2026. The 8-K lists Items 2.02, 7.01 and 9.01.
Western Digital Corp submitted a 10-Q filing dated Oct. 23, 2026, with a report date of Oct. 1, 2026, and an 8-K filing dated Oct. 22, 2026, with a report date of Oct. 21, 2026. The 8-K lists Items 2.02 and 9.01.
Next Trading Day Checkpoints
- Watch whether negative breadth persists across NYSE, American Stock Exchange and Nasdaq-listed stocks.
- Track SPY, QQQ and DIA as market-reference ETFs in the next completed U.S. session.
- Monitor volume and price movement in BE, WDC and CRWD after their Oct. 23 moves.
This article reports the supplied market data and SEC filing metadata for Oct. 23, 2026. Selected stocks are not recommendations. ETF performance is reported for the ETFs themselves, not as exact performance of the underlying indexes.