Investors watch Wall Street for signals about potential movement in stocks, and an upgrade from analysts is one important marker of shifting fundamentals. Analyst upgrades come in response to a variety of internal and external factors, and an upgrade does not necessarily mean that a company is likely to also have upside in its near future—nor even that it may be a strong choice for many investors at all. However, in a choppy market, investors may assign more value to analyst ratings overall. Below are three ...