as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
how do you compare the sales of a company like coca cola against another company like jpmorgan chase to figure out the best investment opportunity?
user
the question isn't sales but profits. banks traditionally profit by making loans. just as with a physical product, there are costs involved, income produced, and the difference between the two is gross profit. from there you can get net profit, and from there you can look at efficiency or profit per share or whatever other metric floats your boat. or you can just  buy index funds, get average rates of return, and not have to think about it.
assistant