Let's talk about investing in tech stocks. You know, where the proverbial Wall Street runs through Silicon Valley, a lot of folks get hung up on a stock's share price, thinking it tells you how valuable the company is.

But here's the thing: looking at the price per share alone doesn't really tell you much. That can change with a simple stock split, for example -- neither adding nor removing value but dividing the company's stock-based ownership into a different number of shares.

What you really need to look at are things like the market cap -- that's the total worth of all shares in a company. It gives you a more useful picture, especially when you compare it to how big the market could potentially be (known as the total addressable market, or TAM).

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Source Fool.com