As investors, it’s important for us to understand both accounting and economic concepts, like the equilibrium level of income -- it makes us better at choosing good companies that can go the distance.

In 1950, John Nash — the mathematician later featured in the book and film “A Beautiful Mind” — wrote a two-page paper that transformed the theory of economics. His crucial, yet utterly simple, idea ...

A market price per share of common stock is the amount of money investors are willing to pay for each share. The price of shares rises and falls in response to investor demand. The obvious fact is ...