User:Invest
"A bear market is when the stock market falls for an extended period of time. The fall is usually around 20% and is the opposite of a bull market. A bear market is caused by the decline in stock prices which are directly influenced by a decrease in company profits. Falling stock prices can also be a correction of over valued stock.
When stocks become to expensive they will eventually fall to a more reasonable price. The decline stock market is further perpetuated by scared investors who will sell their stocks at the first sign of decrease stock prices and the cycle continues. For example the bear market during thw 1970s went on for over a decade when stocks went sideways. It was experiences like that which cause people to move away from day and active trading into more low risk investments."