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Biggest moves on record

Every trading day we hold, as a bar. The five biggest are marked.

  1. 1+3.1%6 Feb 2026Max
  2. 2−2.8%10 Oct 2025Max
  3. 3+2.8%31 Mar 2026Very High
  4. 4+2.8%8 Apr 2026Very High
  5. 5+2.5%11 Jun 2026Low

Every day, by size of move

252 trading days, 2025–2026. One square is one day.

  • Max41.6%
  • Very High20.8%
  • High72.8%
  • Moderate166.3%
  • Low8533.7%
  • Very Low13854.8%

Coming up

Dates that often move US S&P MidCap 400, over the next 30 days. Days are in UTC, the world's standard clock.

  • Wed 28 Octin 8 days US interest rate decisionThe US central bank decides whether to raise, hold or cut rates.

Compared with its neighbours

On a normal day, US400 moves about 0.61% up or down. That is livelier than 6 in 10 indexes we follow.

Region · United States

US500US S&P 500NAS100US Nasdaq 100US30US Dow Jones Industrial AverageNASCOMPUS Nasdaq CompositeUS2000US Russell 2000

Region · United States

US500US S&P 500NAS100US Nasdaq 100US30US Dow Jones Industrial AverageUS2000US Russell 2000

In the news

Recent headlines about US S&P MidCap 400, from the outlets that wrote them.

  1. 01Seeking Alpha1 day agoPoll Position: Performance Of The S&P MidCap 400 Around Mid-Term Elections