"The old Wall Street adage "never invest in anything that eats or needs repairs" may apply to racehorses, but it's malarkey when it comes to houses." - Peter Lynch

If you’re considering a stock on the strength of some specific product that a company makes, the first thing to find out is: What effect will the success of the product have on the company’s bottom line?

Whenever you invest in any company, you’re looking for its market cap to rise. This can’t happen unless buyers are paying higher prices for the shares, making your investment more valuable.

When looking at the same sky, people in mature industries see clouds where people in immature industries see pie.