Unusual Options Activity
UMC Unusual Options Activity - United Microelectronics (NEW)
- Last active day
- August 21, 2026
- Active days (30d)
- 15
- Biggest recent print
- Put $21.0000 · $328K
AI summary
On August 21, 2026, United Microelectronics Corporation (UMC) saw notable options activity with two prints recorded. The total put premium amounted to $489,480, while no call premiums were reported. The activity included a put option with a strike price of $21.00, expiring on August 21, 2026, which had a premium of $328,020 and a volume-to-open interest ratio of 1.5. Additionally, a put option with a strike price of $15.00, expiring on January 15, 2027, was also active, showing a premium of $161,460 and a volume-to-open interest ratio of 4.0. UMC has experienced options activity on 15 out of the last 30 days, indicating a consistent level of interest in its options market. The overall put/call balance reflects a significant focus on put options during this session.
AI-generated summary
Prints on August 21, 2026
| Ticker | Side | Strike | Expiry | Vol/OI | Premium | IV | New |
|---|---|---|---|---|---|---|---|
| UMC | Put | $15.0000 | 01/15/27 (146d) | 4.0× | $161K | 59% | |
| UMC | Put | $21.0000 | 08/21/26 (1d) | 1.5× | $328K | 314% |
History
- 2026-08-212 prints$0K calls$489K puts
- 2026-08-202 prints$0K calls$634K puts
- 2026-08-192 prints$0K calls$839K puts
- 2026-08-181 prints$0K calls$533K puts
- 2026-08-122 prints$3.4M calls$0K puts
- 2026-08-112 prints$3.4M calls$0K puts
- 2026-08-101 prints$109K calls$0K puts
- 2026-08-071 prints$0K calls$391K puts
- 2026-08-061 prints$0K calls$391K puts
- 2026-08-051 prints$58K calls$0K puts
- 2026-08-042 prints$58K calls$58K puts
- 2026-08-031 prints$0K calls$58K puts
- 2026-07-292 prints$190K calls$0K puts
- 2026-07-283 prints$295K calls$0K puts
- 2026-07-271 prints$105K calls$0K puts
- 2026-07-212 prints$0K calls$492K puts
- 2026-07-205 prints$0K calls$1.1M puts
- 2026-07-177 prints$7.1M calls$747K puts
- 2026-07-164 prints$7.1M calls$176K puts
- 2026-07-141 prints$229K calls$0K puts
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