MasTec Stock Extends A 13-Day Losing Streak To A 25% Loss
Shares of MasTec (MTZ) have closed lower in each of the last 13 sessions, a cumulative decline of 25.1%. That erased about $4.5 billion from the company’s market value, which now stands at about $13.4 billion. The stock closed at $171.05 on Friday, October 23, its lowest close of the past year.
The Streak Next To The S&P 500
Returns for MTZ and the S&P 500 over the streak and the periods around it, all ending Friday, October 23 and including dividends:
| Return Period | MTZ | S&P 500 |
|---|---|---|
| 1 Day | -0.3% | -0.5% |
| 13 Days (Current Streak) | -25.1% | -2.5% |
| 1 Month (21 Trading Days) | -19.3% | -1.0% |
| 3 Months (63 Trading Days) | -49.2% | 3.1% |
| Year To Date | -21.3% | 12.4% |
| 1 Year (252 Trading Days) | -13.1% | 15.1% |
How The Streak Compares With The Market
Over the same 13 trading days, the S&P 500 returned -2.5% including dividends, so the slide is mostly MasTec’s own story rather than the market’s. Over the past three months the stock is down 49.2%, a window that includes the streak; over the other 50 sessions of that window it was down 32.2%.
Is The Business As Weak As The Stock?
On the fundamentals, revenue grew 23.5% over the last twelve months, against a median of 7.8% for S&P 500 Industrials stocks; its operating margin is 5.1%, versus a median of 17.6%; and the stock trades at 27.0 times trailing earnings against a median of 26.3. The read is mixed: revenue growth above the median on one side, margins below the median on the other.
A slide like this raises an obvious follow-up: which marked-down stocks are actually worth buying? Our Buy the Dip screen runs that test every day, flagging beaten-down names whose fundamentals still hold up.
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.