Interesting finding in my put buying strategy research:
"It is somewhat surprising that period (b), which includes the October 87 crash, was not
the worst month for selling puts – in fact, it was only the forth worst after periods (a), (c),
and (e). Even though the decline in the underlying was the largest (-14%) over period (b),
puts were selling at unusually high prices at the beginning of the period (as evidenced by the
corresponding ATM volatility in Table 3). The market was very volatile and put premiums were
high because the S&P 500 had already fell substantially in the previous month. In periods (a),
(c), and (e), the returns in the underlying were less dramatic (-11%, -10%, -9%). However, they
happened after relatively calm periods, when puts were inexpensive by historical measures."