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AI-generated coverage of the most relevant US equity stories, refreshed every two days.

US Equities

Aug 23, 2026

Moderna’s 177% Single-Day Surge Sets 25-Year Record in S&P 500

Moderna shares soared 177% in a single session this week, a move described as the biggest one-day gain for any S&P 500 stock in 25 years, putting the biotech group back in the market spotlight. The surge also made Moderna the top weekly gainer on at least one overbought-stock screen, standing out even as the broader S&P 500 and Nasdaq indexes ended the week higher but still nursing weekly losses.

US Equities

Aug 21, 2026

Walmart earnings stumble becomes the week’s defining drag on the Dow

Walmart’s latest quarterly earnings miss and a sharp post-report stock selloff have become the dominant story in U.S. equities, dragging the Dow lower and knocking consumer staples to the bottom of the S&P 500 sector rankings. The retailer’s disappointing results and ensuing analyst reaction have raised fresh questions about the strength of U.S. consumer spending and the resilience of the recent market rally.

US Equities

Aug 19, 2026

Amylyx Soars Over 60% as Biotech Outliers Defy U.S. Market Pullback

Amylyx Pharmaceuticals has emerged as one of the most striking U.S. equity moves of the week, with shares surging more than 60% in a single session and nearly tripling year to date, according to Trefis. The biotech’s rally comes as broader U.S. benchmarks retreat under pressure from higher yields, highlighting how pockets of healthcare and growth stocks are breaking away from the broader market’s pullback.

US Equities

Aug 15, 2026

Reddit’s S&P 500 Entry Becomes the Week’s Standout U.S. Equity Story

Reddit’s pending inclusion in the S&P 500 on August 18, replacing AvalonBay Communities, has become one of the most closely watched developments in U.S. equities over the past few days. The announcement triggered a double-digit percentage jump in Reddit’s shares and adds a new social-media and AI data angle to a benchmark that is trading near record highs despite a modest pullback on weaker retail sales data.

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