Trading Edge #48
Instrument/asset
S&P 500 (SPY)
Trading rules
The trading rules of the edge read like this (please also backtest yourself – you might find a way to improve it):
- Buy at the close on the last trading day of the month; and
- Sell after N-days.
Results
Trading performance from 1993 until today (sell after N-days):

Improved edge
The results are better if the last day of the month is a down day:

If we exit after 3 trading days we get the following equity curve:

