During financial crises, stock prices suffer. However, they typically recover over time.
This chart illustrate the cumulative returns of a balanced (60% stock/40% bond) portfolio after five historical financial crises. In the short term, uncertainty from such external shocks can create sudden drops in value. For example, the portfolio posted a negative return one month after the October 1987 stock-market crash. Over a longer period of time, however, returns were much more attractive, and investors who stayed the course reaped considerable rewards.