I've been a long-time lurker on Quantopian but have only recently managed to get a grasp of the platform and put some backtests together.
Having finally figured out how to use the fundamental data and alphalens I've put together a very simple but alarmingly effective strategy based on Free Cash Flow yield. Interestingly it works very well until the start of this year - would be keen to hear thoughts. I suspect a lot of quality-based factor strategies are underperforming this year as we enter into these later stages of the bull market in equities.
Below a brief outline of the strategy - interested to hear thought/criticisms. Open to the possibility that I've made a fatal error somewhere.
1) Rank Q1500 universe by Free Cash Flow Yield
2) Long top Quintile, Short Bottom Quintile
3) Rebalance weekly