Familiarity Breeds Short-Termism
Familiarity Breeds Short-Termism | Seeking Alpha
Investors confuse familiarity with safety. Home country bias, in which investors all over the world overweight their home country by wide margins, is a good example of this phenomenon.
Familiarity with a stock influences investors:
• Investors shorten their holding period in a stock on which they execute multiple round-trip trades.
• On average, the holding period shortens by 11 percent with each additional round trip - the more familiar, the shorter the holding period.
• The tendency to be short-termed is associated with reinforcement learning - investors are more likely to shorten the holding period after a round trip where they could have realized a better return had they sold earlier.
• Investors tend to lose wealth with their repeated trades, earning a four-factor (market beta, size, value and momentum) alpha of -1.3 percent.
• Investors exhibit an increase in the disposition effect (the tendency to sell winning investments prematurely to lock in gains and hold on to losing investments too long in the hope of breaking even) with repeated round trips.
Individual investors do not learn from their experiences when trading in the same stock. It appears that familiarity may breed overconfidence, which in turn leads to too much trading, which can be injurious to your financial health. The more individuals trade a company's stock, the shorter the holding period became. And short-termism leads to negative outcomes.