Options trading for SK Hynix American Depositary Receipts (ADR) commenced on U.S. exchanges today, with a notable preference for short-term contracts. By 10:25 a.m. New York time, trading volume had reached around 33,000 contracts, with over two-thirds set to expire this Friday. The most active were call options at a $185 strike price, totaling approximately 2,900 contracts, followed by put options at $145.