A 5-Day Losing Streak Has Marathon Petroleum Stock Down 16%

Marathon Petroleum (MPC) stock is on a 5-day losing streak, down 16.2% since the run began. That erased about $20.1 billion from the company's market value, which now stands at about $104.0 billion. The stock closed at $372.74 on Friday, November 6, 23.1% below its 52-week high of $484.92 and 131.9% above its low of $160.76.

The Streak Next To The S&P 500

Returns for MPC and the S&P 500 over the streak and the periods around it, all ending Friday, November 6 and including dividends:

How The Streak Compares With The Market

Over the same 5 trading days, the S&P 500 returned -2.7% including dividends, so the slide is mostly Marathon Petroleum's own story rather than the market's. 12 other S&P 500 stocks are currently on losing streaks of 5 days or longer. Over the past three months the stock is up 16.7%, a window that includes the streak; over the other 58 sessions of that window it was up 39.2%.

What The Numbers Say About The Slide

On the fundamentals, revenue grew 31.2% over the last twelve months, against a median of 19.5% for S&P 500 Energy stocks; its operating margin is 11.4%, versus a median of 23.3%; and the stock trades at 7.1 times trailing earnings against a median of 13.4. The selling is hard to square with the fundamentals: revenue growth above the median and a multiple below the median.

If the drop has you weighing an entry, resist buying on price alone. Our Buy the Dip screen ranks the marked-down names where growth and cash generation still hold up.

Prefer the theme to the single name? An energy ETF like XLE holds the whole group, not just this stock. It is still a concentrated bet on one theme, which is the gap the portfolio below is built to close.

A Slide Like This Is Why Diversification Exists

Watching one stock fall day after day is the clearest lesson the market teaches about single-name risk. Whether this particular decline is an opportunity or a warning, the deeper point is the same: no one name should be able to do this to your portfolio.

The Trefis High Quality (HQ) Portfolio is built on that principle: roughly 30 businesses selected for consistent cash generation, strong margins, and resilient balance sheets, sized and rebalanced with rules. It has a track record of outpacing a benchmark that combines the S&P 500, the S&P MidCap 400, and the Russell 2000. Study the slide; spread the risk.