The SPDR S&P 500 ETF (SPY) - the ETF that tracks the widely popular S&P 500 index - closed above its 200-day moving average on Tuesday.
This is a widely followed trend indicator, and for good reasons. The data shows that making investment decisions based on such trend indicator can be remarkably effective at increasing returns and reducing downside risk.
However, even if trend-following on a single index works well in the long term, it can substantially underperform over several years. Implementing a trend-following strategy on multiple markets, sectors, and