Is ExxonMobil Stock Increasing Your Market Risk

You hold ExxonMobil (XOM) alongside index funds, and in the last five sessions, the stock rose 2.7% as the S&P 500 fell 1.0%. You already own the market's risk through those funds, so a large ExxonMobil position is either more of it or an offset. Is ExxonMobil stock increasing your market risk?

No, ExxonMobil Bucked The Market Over The Past Year

Over the past year of daily closes, ExxonMobil tended to move the opposite way from the S&P 500. On an average day when the index rose, it gained 0.63%, and the stock fell 0.25%. That is about $25 lost on a $10,000 holding.

On an average day when the index fell, it lost 0.61%, and the stock rose 0.62%. That is about $62 gained on the same holding.

The same pattern appears in the index's worst and best months. In March 2026, the S&P 500 fell 5.1% while ExxonMobil rose 11.3%. That month, $10,000 of the stock became about $11,130. In April 2026, the index rose 10.4%, and ExxonMobil fell 9.0%.

The stock's own swings were wider, though. Its volatility, how widely its daily moves spread over a year, was 26% against 13.0% for the index. ExxonMobil's beta, its average move for each 1% move in the index, was -0.55. On average, for each 1% the index moved, the stock moved a little over half a percent the other way.

So on the average day over the past year, ExxonMobil did not add to your market risk. It offset part of that risk while bringing wide swings of its own.

Could ExxonMobil Stock Follow The Market Again?

It could. The swings are likely to stay wide, but their direction is not fixed. On its second-quarter 2026 call, management said the quarter was shaped by disruption. Management added that the conflict in the Middle East continued into the second quarter. Roughly 3 million barrels a day of refining capacity was unavailable to the market.

ExxonMobil's results are exposed to a disrupted oil and fuel market, so the wide swings are likely to continue. ExxonMobil temporarily lost about 10% of its upstream production. At the same time, management expects the refining market to stay very robust, with very high margins. Energy Products, its refining business, rose from about 9% to about 23% of the earnings from its business lines over five years.

The direction is less settled. Over the past year, ExxonMobil's daily moves were only loosely linked to the index's, and the link ran the opposite way. Over the past five years, the link was also loose but ran the same way. So moving against the market is not a fixed trait of ExxonMobil stock.

ExxonMobil's Five-Year Swings Paid Better Than The Market's

Over the past five years, ExxonMobil rose about 26% a year, against about 13% for the S&P 500. Its swings were wider over that window too. They ran at 27% a year, against 17.0% for the index.

Return divided by volatility is the return you got for each unit of swing. For ExxonMobil it was 0.99 over those five years, against 0.80 for the index. So you were paid more for ExxonMobil's swings than for the market's.

In the past year's pattern, ExxonMobil tended to dip on the market's up days and rise on its down days, though only loosely. If you also hold oil producers, refiners, or an energy fund, ExxonMobil makes your bet on oil and fuel prices bigger. Part of that five-year edge came during a refining shortage. The swings keep paying you only if ExxonMobil keeps earning more per unit of swing than the market after that shortage ends.

Beyond XOM: A Systematic Way To Grow Your Money

Before you decide on XOM, consider a better choice. Since its inception, the Trefis High Quality (HQ) Portfolio has returned 105%, beating the benchmark that combines the three major indices - the S&P 500, S&P Mid-cap, and Russell 2000. And it did so without taking the concentrated risk that comes with do-it-yourself stock picking.