Horizontal Spread (also called Time Spread or Calendar Spread)

What is Horizontal Spread (also called Time Spread or Calendar Spread)?

Horizontal Spread (also called Time Spread or Calendar Spread) meaning An option spread involving the simultaneous purchase and sale of options of the same class and strike prices but different expiration dates. See Diagonal Spread,Vertical Spread.

 

reference: U.S. COMMODITY FUTURES TRADING COMMISSION – CFTC Glossary