In 1981, the Nobel Prize-winning economist Robert Shiller published a groundbreaking study that contradicted a prevailing theory that markets are always efficient. If they were, stock prices would generally mirror the growth in earnings and dividends. Shiller’s research showed that stock prices fluctuate more often than changes in companies’ intrinsic valuations (such as dividend yield) would suggest.1
Shiller concluded that asset prices sometimes move erratically in the short term simply because investor behavior can be influenced by emotions such as greed and fear. Many investors would agree that it’s sometimes difficult to stay calm and act rationally, especially when unexpected events upset the financial markets.
Researchers in the field of behavioral finance have studied how cognitive biases in human thinking can affect investor behavior. Understanding the influence of human nature might help you overcome these common psychological traps.
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