SK hynix closed at USD 198.63, up 7.05%.

Despite the sharp rally, large options prints leaned defensive and directional-to-the-downside. The session featured a $3.51 million call purchase as the main bullish outlier, but that was overshadowed by a $1.43 million synthetic put and additional bear call spread activity that collected premium while capping upside. Net block flow suggests institutions were more interested in fading strength than extending it.

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Options Indicators

SKHY’s implied volatility stands at 71.87%, and with an IV percentile of 21.95%, current volatility is sitting on the lower end of its own historical range, indicating that options are relatively cheaply priced rather than expensive. The IV/HV ratio of 1.06 suggests implied volatility is only slightly above realized volatility, so option premiums look fairly aligned with recent actual movement, with a mild premium built in.

The Call/Put volume ratio is 1.43.

Large Trades

A call purchase worth $3.51 million stood out as a straightforward bullish wager, with buyers taking 1,700 contracts of the December 18, 2026 $225.0 call. With SKHY referenced at $198.63, this strike was out of the money at the time of execution, which makes the trade a higher-conviction upside bet on a meaningful advance into expiration rather than a defensive hedge. The structure suggests the trader was positioning for continued appreciation above $225.0 while limiting risk to the premium paid. A synthetic put option with a net size of $1.43 million was also notable, built through selling 1,500 contracts of the September 18, 2026 $200.0 call and buying 3,000 contracts of the September 18, 2026 $170.0 put. The short call strike sat slightly above the reference price and was out of the money, while the long put was also out of the money, creating a clearly bearish synthetic short exposure that benefits from downside pressure in the underlying and reflects a more deliberate negative directional stance than a simple standalone put purchase.

Overall, the large-trade flow points to a bearish institutional tone in SKHY. Although there was one meaningful upside call buy, the broader block activity was dominated by bearish structures, including a large bear call spread collected for premium and the synthetic put highlighted above, alongside additional put buying in the full tape. That mix indicates traders were more focused on capping upside, collecting credit through bearish call structures, and establishing downside exposure than on chasing further gains, leaving the aggregate signal decisively negative.

Strategy Reference

For traders with a neutral-to-bearish view and wanting a defined-risk credit, a bear call spread such as selling the $210.0 call and buying the $230.0 call in a monthly expiration offers premium collection with margin capped at the spread width, while a seller seeking low assignment probability could consider out-of-the-money puts below the $170.0 support area built by institutional puts.