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.
The correction has started recently and the performance by country year to date has been mixed, but the most pronounced selloffs have been associated with the largest revisions to GDP growth forecasts.