Max pain is the price where the total value of all open calls and puts would be lowest at expiration, so option buyers as a group would lose the most. Some traders watch it as a level the stock may drift toward near expiration, because option sellers, often market makers, hedge their positions in ways that can pull the price toward heavily traded strikes. It is a theory, not a guarantee.

As of the Nov 4, 2026 close, max pain for Ameren options about one week from expiration was $100.43. The chart above shows the exact max pain for each expiration date.

Ameren closed above its near-term max pain on 20 of the last 20 trading days. On Nov 4, 2026 it closed at $113.16, 12.7% above max pain of $100.43.

Over the last 20 trading days, near-term max pain for Ameren ranged from $99.40 to $101.29. It went from $100.06 on Oct 8, 2026 to $100.43 on Nov 4, 2026. See the AEE max pain history for a longer view.

Ameren owns rate-regulated generation, transmission, and distribution networks that deliver electricity and natural gas through the company's two main subsidiaries, Ameren Missouri and Ameren Illinois.