A 6-Day Losing Streak Has Quanta Services Stock Down 16%
A multi-day slide in the stock has erased significant value, presenting a mixed picture of growth and valuation for investors to weigh.
Quanta Services (PWR) stock has now moved lower for 6 consecutive trading days, posting a cumulative loss of 16%. That streak has erased about $18 billion from the company’s market value, which now stands at about $91 billion.
For anyone holding the shares, this sharp move resets the price for a fresh look at the underlying business. The stock’s -18.6% return over the trailing three months is almost entirely composed of this recent slide.
PWR Versus The S&P 500, Streak And Beyond
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Here is how PWR stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | PWR | S&P 500 |
|---|---|---|
| 1D | -2.1% | 0.3% |
| 6D (Current Streak) | -16.4% | -0.9% |
| 1M (21D) | -2.7% | 3.6% |
| 3M (63D) | -18.6% | 2.1% |
| YTD 2026 | 43.1% | 12.2% |
| 2025 | 33.7% | 16.4% |
| 2024 | 46.6% | 23.3% |
| 2023 | 51.7% | 24.2% |
The stock’s slide sits against a backdrop of high growth and a premium valuation.
This decline is specific to the company; the S&P 500 returned -0.9% over the same 6 trading days. The market may be weighing a mixed fundamental picture. Revenue over the last twelve months grew 26.3%, well above the S&P 500 median of 8.4%.
However, its operating margin is 6.1%, below the S&P 500 median of 18.4%. The stock also trades at a price-to-earnings multiple of 68.4, compared to the S&P 500 median of 23.5. This kind of streak is not unique at the moment, as 7 OTHER S&P 500 stocks are on losing streaks of 6 days or more.
A streak is a signal to re-evaluate, not a command to act.
A streak of this length is primarily information. It tells you that a stock has captured attention and that momentum has taken hold, but it does not provide an instruction. The disciplined response is not to chase the trend but to use the new price as a reason to check your thesis.
The data here provides a starting point: a business with high growth now trading at a lower price, but one that still carries a high valuation multiple and lower margins than the median S&P 500 company.
A slide like this always poses the same 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.
Prefer the theme to this single name? An industrials ETF like XLI holds the sector rather than this one name. It is still a concentrated bet on that one theme, though, which is exactly the gap the portfolio below closes.
Falling Prices Test Conviction. Rules Do Not Flinch
A losing streak forces a choice on every holder: sell into weakness, average down, or freeze. All three are emotional answers to what should be an analytical question, and emotions priced at market open are expensive.
The Trefis High Quality (HQ) Portfolio takes the emotion out: about 30 quality businesses screened for the fundamentals that survive bad stretches, held and rebalanced by rules. It has a track record of outpacing a benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. Let the rules do the flinching for you.