Post-mortem analysis --- When should you trade short-term, and when should you hold long-term? A lot of people in the stock market love to buy low and sell high, but honestly, this is often why most retail investors underperform the market. If you must trade, the first thing to figure out is whether a particular asset is better suited for trading or holding. The key to this judgment lies in the strength of the upward trend relative to its volatility. The metric for this is: Trend Strength Ratio (R) = Annualized Return ÷ Annualized Volatility. Essentially, it measures whether the trend (Signal) is strong enough to overpower market noise (Noise). The closer this R value is to 0, the more suitable it is for trading. Conversely, the higher the R value, the more suitable it is for holding. Take the S&P 500, for example. Over the past year, its R = 1.2, which is significantly higher than its 10-year average of 0.89. This clearly indicates that it’s a target you should avoid trading and instead let time work its magic on your returns. The larger the R value, the faster the stock price is rising, making it more suitable for long-term holding. The smaller the R value, the more the stock price is oscillating back and forth, making it better for short-term trading. For instance, take SMH. Over the past year, it’s up about 136%, with an annualized volatility of around 60%, giving it a Trend Strength Ratio of about 2.2. This shows that while daily fluctuations are significant, the upward trend is much faster than the volatility. Many people who tried to trade short-term ended up underperforming compared to simply holding. So, as a retail investor, the real focus shouldn’t be on “how big the volatility is,” but rather on “whether the upward trend is faster than the volatility.” When the trend outweighs the volatility, be patient and hold. When volatility starts to overpower the trend, short-term trading becomes more profitable. How do you find assets where the trend is stronger than the volatility? Spend more time researching fundamentals and less time staring at candlestick charts.