In May 2010, the flash crash occured on week 2 which had an amplitude of 12%
In August 2011, the large correction was also accelerated in week 2 which had an amplitude of 11%
Conclusion: be long some 5month, 10% out of the money put and keep it 1 week in case...
if nothing happened, resell at a minimum theta loss.
If something happened: cash in