From time to time, stock markets go through periods of uncertainty. This could be down to some poor economic news or perhaps due to a political crisis. The sharp falls that can be experienced at such times are understandably unsettling for investors. They can even tempt some to change their long-term plan by selling their investments. However, stock market volatility does tend to be short lived. Therefore, most experts agree that investors are probably better off sitting tight through these unnerving periods.