ExxonMobil's Return Comes From Somewhere The Index Does Not Go

ExxonMobil's Return Comes From Somewhere The Index Does Not Go Trefis Team Wed, August 19, 2026 at 2:16 PM EDT 3 min read COP XOM OXY SPGI MPC Photo by Moni49 on Pixabay A five-year correlation this low is not a statistical curiosity; it is what an earnings stream built on barrels and product margins looks like beside the index. ExxonMobil (XOM) has gained 4.3% over the last five trading days while the S&P 500 slipped 0.5%, and a stock rising while the tape sags is the kind that gets chased. But the question that decides your outcome is different: how much of this return is its own story rather than the index you already own, and what owning it does to your swings. On five years of evidence, most of that return is not the index. Most Of What Moves This Stock Is Not What Moves The Index Over the past five years ExxonMobil's correlation to the S&P 500 has been 0.26, on a scale where 1.0 would mean lockstep. Gold, the asset investors hold precisely because it does its own thing, correlates to this stock at 0.1 over the same five years. The index reading is higher, and still describes a stock that has largely moved independently of the broad market. That independence has not cost return, though it has cost calm: the stock annualized 30.2% over that window against 13.2% for the index, at 26.7% volatility versus 17.2%. Barrels And Product Margins Are What Set This Return Stream That independence comes from what the company sells. In the second quarter of 2026 ExxonMobil lost ro…