Company: Zions Bancorporation

It's the basic question when investing in a stock: is it on the way up or will it go down? To answer this question,  Wall Street has developed numerous ways of attempting to predict what will happen, estimating various attributes tied to stock performance in order to determine what the future holds for a company's valuation.

In the Fed's latest round of bank stress tests, some analysts say Citigroup has the greatest potential to deliver a positive surprise to Wall Street.