I traded different options for the same underlying security, but the 1099 only reported wash sales for the same exact option. (fairmark.com)
In options trading, a vertical spread is an options strategy involving buying and selling of multiple options of the same underlying security, same expiration date, but at different strike prices. (en.wikipedia.org)
The purchase of a call and a put simultaneously on the same underlying security allows the investor to take advantage of a volatile move in share price in either direction. (sparxtrading.com)