RT Journal Article SR Electronic T1 Valuing S&P 500 Bear Market Warrants With a Periodic Reset JF The Journal of Derivatives FD Institutional Investor Journals SP 99 OP 106 DO 10.3905/jod.1997.407987 VO 5 IS 1 A1 Stephen F. Gray A1 Robert E. Whaley YR 1997 UL https://pm-research.com/content/5/1/99.abstract AB