Unusual Options Activity: $18M Bet on WDC $390 Calls Expiring Dec 18
4,551 contracts traded vs. 2,120 open interest, about $18.2M in premium.
Traders bought or sold 4,551 WDC $390 call contracts expiring Dec 18, about $18.2M in premium, against just 2,120 contracts of existing open interest (2.1× volume to open interest). That makes it one of the largest unusual options trades in the market in the latest session.
The strike is in the money with WDC at $397.28 (+1.0% on the day). Volume above open interest means new positions are being opened, which is why options traders watch these prints closely. Calls gain if the stock rises above the strike before expiration, though big prints can also be hedges.
Other unusual WDC contracts
| Contract | Volume | Open int. | Premium |
|---|---|---|---|
| $390 Call · Dec 18 | 4,551 | 2,120 | $18.2M |
| $380 Call · Oct 30 | 1,828 | 615 | $5.0M |
| $450 Call · Apr 16, 2027 | 700 | 62 | $3.3M |
| $380 Call · Oct 16 | 1,019 | 90 | $1.5M |
| $620 Call · Oct 23 | 325 | 69 | $3,250 |
Source: Nasdaq option chains (end-of-day volume and open interest), scanned by GTA Options Flow across the 160 most active U.S. stocks.
Written by the GTA Research Desk from GTA Terminal data. Not investment advice.
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