It's not always an easy task to determine which figures matter more when investing. For example, which metric is more important? Sales? Earnings per share? Net debt? The answer, of course, is that it depends. What's crucial for one company or industry is often less important to another. Rocket Lab USA (RKLB -2.63%) stock has witnessed a nearly 400% appreciation over the last 12 months. So with regards to its business, which is the most important number investors should be keeping an eye on? For example, in ...