Short–term underperformance doesn’t trouble us; indeed, because it is the price that must sometimes be paid for longer-term outperformance.
Non-consensus ideas have to be lonely. By definition, non-consensus ideas that are popular, widely held or intuitively obvious are an oxymoron. Thus such ideas are uncomfortable; non-conformists don’t enjoy the warmth that comes with being at the center of the herd. Further, unconventional ideas often appear imprudent. The popular definition of “prudent” – especially in the investment world – is often twisted into “what everyone does”.
Stock prices will always be far more volatile than cash-equivalent holdings. Over the long term, however, currency-denominated instruments are riskier investments – far riskier investments – than widely-diversified stock portfolios that are bought over time and that are owned in a manner invoking only token fees and commissions. That lesson has not customarily been taught in business schools, where volatility is almost universally used as a proxy for risk. Though this pedagogic assumption makes for easy teaching, it is dead wrong: Volatility is far from synonymous with risk. Popular formulas that equate the two terms lead students, investors and CEOs astray.
– Warren Buffett, 2014 Berkshire Hathaway Annual Letter