WITH LITERALLY THOUSANDS of companies available to invest in, one of the toughest challenges for any investor is figuring out which ones are worth detailed examination and which ones aren’t. Now that you know the tools of in-depth fundamental analysis, I want to give you some tips on narrowing down the field. Apply the following tests to any stock that you think might be a worthwhile investment, and you should be able to decide in 10 minutes whether it warrants much of your time.

