Some companies make the things they sell from scratch. Others simply assemble what arrives at the gate. The difference tells you more about the quality of a business than almost any single number will.
Some perfectly good businesses earn almost nothing for months, then make most of their year in a few weeks. Here is how to read one without being fooled — in either direction.
Nobody can pretend their way through a price war. It is the one test a business cannot revise for — and the results are printed, quarter by quarter, for anyone willing to read them.