United Microelectronics Corporation options tape
Read from CBOE's delayed chain on 26 September 2026, with United Microelectronics Corporation at $24.49: open interest within 90 days was 105,111 call and 35,684 put contracts, a put/call ratio of 0.34; the day's volume was 864 calls and 73 puts (0.08). The most call open interest sits at the $26.00 strike (29,720 contracts) and the most put open interest at $22.00 (5,472). The at-the-money straddle for 16 October 2026, 20 days out, was priced at 10.2% of spot. For 16 October 2026, implied volatility was 51.0% at the put 5% below spot and 57.9% at the call 5% above, -6.8 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $26.00 | 29,720 |
| Puts | $22.00 | 5,472 |
The strike with the most open interest on each side, across expiries within 90 days.
Open-interest builds against the previous day appear from the second daily read of this name.
Source
CBOE delayed quotes for UMC, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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