Because the stock value doesn't reflect real (book value). By and large, stock value has nothing to do with how much a company can really cost on the market.
The value of a company in the stock market reflects the WINDOWS of traders about how much a company's shares may cost in the future. I mean, quotes reflect stockholders' expectations as to whether a company's shares will grow in the future. If current stockholders believe that stocks have peaked, they will start selling them and quotes will begin to fall.
So. sometimes quotes are undervalued, which means that stockholders don't have enough confidence in their prospects.
Although, investors like Warren Buffett are looking for companies that are undervalued and buy their stocks, but I think you should have a lot of capital to act like this =)
The value of a company in the stock market reflects the WINDOWS of traders about how much a company's shares may cost in the future. I mean, quotes reflect stockholders' expectations as to whether a company's shares will grow in the future. If current stockholders believe that stocks have peaked, they will start selling them and quotes will begin to fall.
So. sometimes quotes are undervalued, which means that stockholders don't have enough confidence in their prospects.
Although, investors like Warren Buffett are looking for companies that are undervalued and buy their stocks, but I think you should have a lot of capital to act like this =)