RT Journal Article SR Electronic T1 A Profitable Call Spreading Strategy on the CBOE JF The Journal of Derivatives FD Institutional Investor Journals SP 24 OP 44 DO 10.3905/jod.1995.407913 VO 2 IS 3 A1 Robert L. Welch A1 Louis Culumovic YR 1995 UL https://pm-research.com/content/2/3/24.abstract AB