Rather like Fidel's chosen mode of exit.

ECONOMIST: Forest harmony

It maintains the mechanical aspects of Sell in May, avoiding emotional input, but incorporates a simple and well-known short-term technical indicator, MACD, to identify whether the market is still in correction mode when the entry date arrives in the fall, and whether it is still in rally mode when the calendar exit date arrives in the spring.

FORBES: Sell In May Could Still Come Into Play But Don't Bail Now

This would have allowed for an exit before the debt ceiling selling reached its full panic mode.

FORBES: The Power of Volume