TOP TIERMARKET NEWSWIRE
Movers explained · 2026-08-21

Archived explainer. For the current picture see today's PWR page.

Why Is QUANTA SVCS INC (PWR) Stock Down Today?

By the Top Tier Newswire AI Desk · August 21, 2026 at 12:20 PM ET · reviewed against 3 wire stories

QUANTA SVCS INC (PWR) is down -4.00% in the latest session. Our newswire has captured 3 stories on PWR across 2 sources in the last 36 hours, with AI sentiment reading mixed (avg 55/100).

Public view, delayed 4h. Every headline, price and sentiment read below — and this write-up itself — reaches Pro subscribers live. Public readers see it once it clears the delay.

PWR stock fell 4.00% to $635.99 in the session, underperforming against its recent trend and competitors. The decline followed a sharp intraday reversal from a modest opening gap up. The stock opened at $672.00 but declined steadily throughout the day, reaching a low of $635.61. The move came as Quanta Services Inc. lagged behind its peers, despite a recent analyst upgrade and strong year-to-date performance.

What Happened

The stock’s decline marked a reversal from the prior session’s close of $662.47. Quanta Services opened with a 1.4% gap up but failed to sustain the momentum, falling below its intraday high of $673.51 shortly after 7:25 AM ET. By midday, the stock had dropped to its session low of $635.61. The sell-off occurred despite a recent Keybanc upgrade to Overweight and a $807 price target. The stock’s underperformance was highlighted in a MarketWatch report that noted its lag relative to competitors. Meanwhile, broader market sentiment was mixed, with some headlines emphasizing the strong performance of certain S&P 500 stocks over the past five years.

What The Data Shows

The stock traded on 0.4 million shares, which is 0.3 times the 3-month daily average. The session’s volume and price action suggest a shift in sentiment, despite Quanta’s fundamentals showing strong revenue growth of 26.3% in the trailing twelve months. The stock currently trades at a P/E of 75.8 and a market cap of $101.8 billion. On the 52-week tape, the stock printed 35 fresh 52-week lows on August 21, indicating broader pressure on the name. Congressional transactions in the last 90 days included six buys and two sells, with the most recent filing on July 21.

What To Watch

The stock has no upcoming earnings report noted in the provided data. Investors may monitor coverage breadth for additional analyst commentary or corporate developments that could influence the stock’s direction.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

PWR by the numbers

Last: $635.99Session: -4.00%Coverage: 3 stories / 2 sourcesAI sentiment: 55/100 (mixed)Mkt cap: $101.8BP/E: 75.852w: $363.01 to $788.75
PWR · Aug 21 session (5-min) · -3.49% vs prior close · updated 8:52 PM ET
$634$655$676prev close $662.47$639.357:20 AM10:22 AM1:25 PM4:27 PM7:30 PM7:20 AM · $672.007:25 AM · $673.518:50 AM · $673.419:00 AM · $670.009:10 AM · $668.549:20 AM · $669.009:25 AM · $667.479:30 AM · $662.159:35 AM · $660.669:40 AM · $657.809:45 AM · $656.299:50 AM · $655.459:55 AM · $655.9210:00 AM · $652.1710:05 AM · $653.2910:10 AM · $649.9610:15 AM · $650.9310:20 AM · $652.8810:25 AM · $654.1910:30 AM · $653.4910:35 AM · $650.2510:40 AM · $645.7510:45 AM · $647.0210:50 AM · $643.0810:55 AM · $640.3911:00 AM · $639.7111:05 AM · $641.0811:10 AM · $639.0111:15 AM · $639.0111:20 AM · $639.6011:25 AM · $638.8711:30 AM · $639.6811:35 AM · $641.6011:40 AM · $642.5611:45 AM · $641.1811:50 AM · $641.4711:55 AM · $639.4712:00 PM · $640.1812:05 PM · $636.4012:10 PM · $636.7712:15 PM · $635.9912:20 PM · $636.6212:25 PM · $638.4312:30 PM · $638.0912:35 PM · $639.3612:40 PM · $640.6212:45 PM · $641.5012:50 PM · $640.8712:55 PM · $640.231:00 PM · $639.581:05 PM · $639.531:10 PM · $640.291:15 PM · $642.351:20 PM · $641.131:25 PM · $640.951:30 PM · $641.131:35 PM · $641.241:40 PM · $641.121:45 PM · $642.111:50 PM · $642.451:55 PM · $644.152:00 PM · $644.342:05 PM · $645.032:10 PM · $646.022:15 PM · $646.872:20 PM · $647.802:25 PM · $649.432:30 PM · $649.802:35 PM · $650.212:40 PM · $649.382:45 PM · $649.582:50 PM · $648.092:55 PM · $647.863:00 PM · $647.393:05 PM · $646.623:10 PM · $645.163:15 PM · $645.593:20 PM · $645.813:25 PM · $644.023:30 PM · $645.203:35 PM · $643.223:40 PM · $643.423:45 PM · $643.733:50 PM · $640.923:55 PM · $639.334:00 PM · $639.344:10 PM · $639.344:15 PM · $639.344:35 PM · $639.344:55 PM · $639.515:30 PM · $641.015:50 PM · $646.116:30 PM · $641.286:40 PM · $640.007:00 PM · $641.137:30 PM · $639.35
AI sentiment, last 36h · averaged over 3 stories · 55/100 bullish
AI sentiment 55/100 (bullish)0 · bearish50bullish · 100

The headlines behind the move

Story flow · 3 stories on the wire, last 36h · hover or tap a dot for the headline
36h ago24h ago12h agopublishMarketWatch · sentiment 42 · Quanta Services Inc. stock underperforms Thursday when compared to competitorsMarketWatch · 42Quanta Services Inc. stock underperforms Thursday when compared to competitorsMarketWatch · sentiment 58 · EU Closes Antitrust Investigation into Pratt & Whitney After Contract ModificationsMarketWatch · 58EU Closes Antitrust Investigation into Pratt & Whitney After Contract ModificationsBarchart · sentiment 65 · Are Wall Street Analysts Bullish on Quanta Services Stock?Barchart · 65Are Wall Street Analysts Bullish on Quanta Services Stock?
23d agoBarchartBULLISH 65Analyst

Are Wall Street Analysts Bullish on Quanta Services Stock?

Quanta Services has outpaced the broader market over the past year, and analysts remain highly bullish about the stock’s prospects.

23d agoMarketWatchBULLISH 58General

EU Closes Antitrust Investigation into Pratt & Whitney After Contract Modifications

23d agoMarketWatchBEARISH 42General

Quanta Services Inc. stock underperforms Thursday when compared to competitors

Want the next move before the crowd? The live terminal streams every headline in real time with watchlist alerts, AI sentiment, and the full data stack behind this page.Get Pro Access →

More on PWR: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier PWR move explainers: 2026-08-21