ExxonMobil Corporation (NYSE: XOM) is not feeling the love these days. Investors have pushed its stock lower by around 8% over the past year compared to price increases at the oil major's peers. There are solid reasons for the disparate stock performance, but don't get too caught up in the short-term issues currently hampering ExxonMobil's shares. In fact, the worst mistake ExxonMobil investors can make right now is to forget that what makes this company great can also make it look bad over short periods of time.