The U.S. stock market saw some dramatic moves past week with five stocks posting the largest weekly gains and drops (Mon-Fri Oct 13 -Oct 17, 2025). For each, we highlight the drivers of the move and year-to-date (YTD) performance.

To track momentum in real time, you can use FMP's Top Traded Stocks API to see the most actively traded names.

Top 5 Weekly Gainers/Losers

J.B. Hunt (JBHT) — Top Gainer (~20%)

Blew past Q3 expectations (EPS $1.76 vs. ~$1.47) with cost cuts and stronger intermodal margins, igniting a sharp rally. YTD: still down -2.87%.

American Express (AXP) — Gainer (~+6%)

Shares jumped after a strong Q3 (revenue record, EPS $4.14) and raised FY outlook; Friday's pop led the Dow. YTD:about +16% into Oct 20.

Salesforce (CRM) — Gainer (~+5%)

Rallied on long-term guide to >$60B revenue by FY2030 and a new buyback, easing growth concerns. YTD: still down ~23% into Oct 20.

Kenvue (KVUE) — Loser (~-8%)

Slid on a newly filed U.K. talc lawsuit, adding to existing headline risk around Tylenol; Friday's rebound didn't offset Thursday's plunge. YTD: down roughly 29% by Oct 20.

Hewlett Packard Enterprise (HPE) — Loser (~-9%)

Dropped after FY26 guidance (revenue +5-10%, EPS $2.20-$2.40) came in below Street hopes despite dividend/buyback moves. YTD: roughly +6% into Oct 20.

Track Market Liquidity in Real Time with FMP's Top Traded Stocks API

The Top Traded Stocks API shows which tickers are commanding the most attention right now—a handy complement to weekly performance:

• Most Active Lists: Instantly see the highest-volume stocks across major U.S. exchanges (or filter by NASDAQ/NYSE).
• Real-Time Volume + Price Metrics: Monitor volume, price change, and % change to gauge momentum and liquidity.
• Company Snapshot: Pull names, symbols, and trading volume for quick context.

Example use case: A day trader scans NASDAQ via the Top Traded Stocks API and spots iSun (ISUN) printing unusually high volume. With real-time volume and price-change data in hand, they can decide whether the momentum fits their setup before entering a trade.