Options trading the memory stock mania without paying for Micron or SanDisk at all-time highs. How to trade options on the same theme with less noise: the South Korea ETF EWY holds Samsung and SK Hynix, both directly tied to the memory boom, and the call skew on EWY is significant. This live call ratio spread walkthrough buys the 190 call and sells two 205 calls in June for a 45 cent credit, creating no downside risk, up to $1,500 in profit potential if EWY drifts to 205, and risk only if the ETF rips more than 25 to 30% higher in 40 days. A different way to play a trade everyone is already watching.