S&P 500 ends with its first July decline since 2014. Here are the stocks that led the selloff.

S&P 500 ends with its first July decline since 2014. Here are the stocks that led the selloff.

Philip van Doorn

Sat, August 1, 2026 at 12:10 AM GMT+3 4 min read

Updated with July 31 closing prices.

After a whipsaw end to the month, with a blowout earnings report from Microsoft followed by a bummer of a report from Apple, a painful decline for semiconductor stocks highlighted a tough July for the stock market.

Most Read from MarketWatch

Even with a 9% surge in the last two days of the month, the iShares Semiconductor ETF SOXX, which holds stocks of 30 chip makers and associated companies, was down 22.1% for July. That made for the worst month for SOXX since it tumbled 23.3% in December 2002, according to FactSet data. But the ETF was still up 67.7% for 2026.

Also read: Implosion of Situational Awareness hedge fund has Wall Street betting the bottom is in for the AI trade.

Meanwhile, the iShares Expanded Tech-Software Sector ETF IGV was up 4.4% for July, mainly on the strength of Microsoft's stock MSFT, which ran up 24.6% for the month, but was still down 3.9% for 2026. And the broader technology sector as tracked by the State Street Select Sector SPDR ETF XLK dropped 8% in July, made worse by the 7.4% selloff in Apple's stock AAPL on Friday.

Read: Supply-chain legend Tim Cook finally meets his match with Apple's memory crunch

Memory-chip maker Micron Technology's stock MU punctuated the seesaw end to the month. It soared 18.4% on Thursday but was down 5.9% on Friday and down 28.7% for the month.

With all the noise, the S&P 500 index SPX ended with a slight decline for the month, marking the first time it had a down July since 2014. The index had declined 1.1% in June.

The S&P 500's biggest losers and winners for July

Because of the dramatic decline for semiconductor stocks during most of July, we will first list the S&P 500's largest decliners for the month. Then, we'll list the biggest winners for the month among components of the index.

Here are the largest 20 decliners among the S&P 500 during July:

Company

July price change

2026 price change

2025 price change

Sandisk SNDK

-46.6%

411.8%

N/A

Corning GLW

-45.9%

57.9%

84.3%

KLA KLAC

-39.4%

50.5%

92.8%

Marvell Technology MRVL

-37.0%

120.7%

-23.1%

Intel INTC

-35.4%

144.4%

84.0%

Coherent COHR

-33.4%

42.4%

94.8%

Generac Holdings GNRC

-32.7%

44.5%

-12.0%

Lam Research LRCX

-32.4%

71.2%

137.0%

Flex FLEX

-29.8%

88.3%

57.4%

Applied Materials AMAT

-29.8%

97.5%

58.0%

Micron Technology MU

-28.7%

188.4%

239.1%

Vertiv Holdings VRT

-27.9%

49.1%

42.6%

Lennox International LII

-27.4%

-14.4%

-20.3%

Tesla TSLA

-26.0%

-30.8%

11.4%

Builders FirstSource BLDR

-25.7%

-35.4%

-28.0%

Teradyne TER

-24.0%

90.0%

53.7%

Caterpillar CAT

-23.5%

42.2%

57.9%

AppLovin APP

-23.2%

-41.2%

108.1%

Ciena CIEN

-23.1%

61.2%

175.8%

Moderna MRNA

-21.7%

85.9%

-29.1%

Source: LSEG

Sandisk SNDK was the worst performer among the S&P 500 in July, with a decline of 46.6%, but it remained the best performer for 2026 with a gain of 411.8%. Among the stocks on this list of July's worst performers, Marvell Technology MRVL, Intel INTC and Micron were also still showing triple-digit gains for the year.

Here are the S&P 500's biggest gainers for July:

Company

July price change

2026 price change

2025 price change

Cognizant Technology CTSH

42.9%

-33.3%

7.9%

Accenture ACN

33.3%

-38.2%

-23.7%

PayPal Holdings PYPL

32.5%

-2.0%

-31.6%

Workday WDAY

31.0%

-25.3%

-16.8%

Willis Towers Watson WTW

28.5%

2.2%

4.9%

Cboe Global Markets CBOE

27.8%

23.6%

28.5%

Phillips 66 PSX

25.2%

64.0%

13.3%

Microsoft MSFT

24.6%

-3.9%

14.7%

HP HPQ

24.3%

22.4%

-31.7%

DexCom DXCM

23.9%

25.7%

-14.7%

Intercontinental Exchange ICE

23.9%

-5.9%

8.7%

Marathon Petroleum MPC

23.8%

94.6%

16.6%

Garmin GRMN

23.7%

44.8%

-1.7%

Baxter International BAX

22.7%

36.9%

-34.5%

Regeneron Pharmaceuticals REGN

22.3%

-1.2%

8.4%

Adobe ADBE

22.1%

-28.5%

-21.3%

IQVIA Holdings IQV

21.6%

4.3%

14.7%

CME Group CME

21.3%

-1.9%

17.6%

Intuit INTU

21.1%

-52.3%

5.4%

PTC PTC

20.8%

-21.2%

-5.3%

Source: LSEG

Click on the tickers for more information about each company.

Read: Tomi Kilgore's detailed guide to the information available on the MarketWatch quote page

Take a breath: Get ready to buy the dip in tech stocks. Why the recent selling won't break the bull market.

Most Read from MarketWatch