CMS Energy Corp. options tape
Read from CBOE's delayed chain on 23 September 2026, with CMS Energy Corp. at $64.70: open interest within 90 days was 1,842 call and 778 put contracts, a put/call ratio of 0.42; the day's volume was 270 calls and 24 puts (0.09). The most call open interest sits at the $70.00 strike (1,059 contracts) and the most put open interest at $65.00 (429). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 4.0% of spot. For 16 October 2026, implied volatility was 25.0% at the put 5% below spot and 22.8% at the call 5% above, +2.2 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $70.00 | 1,059 |
| Puts | $65.00 | 429 |
The strike with the most open interest on each side, across expiries within 90 days.
Source
CBOE delayed quotes for CMS, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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