May 18, 2026 · Market Brief

Pre-Market · May 18, 2026

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Broad-based semiconductor weakness dominated overnight trading, with SOXL collapsing 11.29% as memory chips (MU -8.3%) face Chinese competition and AI optical-networking stocks (LITE -10.9%, COHR -6.4%) suffered profit-taking after Leopold Aschenbrenner's exit. Healthcare crumbled on REGN's -10.1% melanoma drug failure, while industrials posted mixed signals: TRI surged 7.6% on strong AI adoption and dividend growth, CTSH jumped 7.9% on restructuring, but VRT tumbled 9.9% on operational concerns and STX fell 8.1% despite raised analyst targets. The broader market decline (SPY -0.49%, QQQ -1.04%) reflects rising Treasury yields from hot CPI data pressuring duration-sensitive sectors like construction services (FIX -7.3%).

Recommendation

Avoid touching semiconductor and optical-networking names until volatility settles—this looks like institutional repositioning, not fundamental breakdown. Selectively buy the dip in quality software (NOW +8.2% on BofA Buy, CPAY +5.3% on blowout earnings) and defensive industrials like TRI that combine AI exposure with dividend safety. Pass on high-beta chip equipment (AMAT, MPWR) showing profit-taking despite positive catalysts; the risk/reward is asymmetric until macro clarity improves.

Indices & ETFs

SPY$735.53

▼ 0.49%

7D ▼ 0.5%30D ▲ 3.6%6M ▲ 10.5%

QQQ$701.54

▼ 1.04%

7D ▼ 1.6%30D ▲ 8.1%6M ▲ 16.2%

TQQQ$72.96

▼ 3.16%

7D ▼ 5.2%30D ▲ 24.5%6M ▲ 43.0%

SOXL$145.65

▼ 11.29%

7D ▼ 23.5%30D ▲ 53.8%6M ▲ 295.3%

SPX$7373.96

▼ 0.47%

7D ▼ 0.5%30D ▲ 3.5%6M ▲ 10.5%

Top Movers30 movers

LITELumentum Holdings Inc.▼ 10.9%

Prominent AI investor Leopold Aschenbrenner exited his stakes in Lumentum, triggering profit-taking across AI optical-networking stocks.

Price

$970.70 → $865.09

Mkt Cap

$67.4B

P/E

151.2x

▼ 17.9%

30D

▼ 3.2%

▲ 257.4%

REGNRegeneron Pharmaceuticals, Inc.▼ 10.1%

Regeneron's fianlimab melanoma drug failed its Phase III primary endpoint, missing efficacy targets versus competitor Keytruda.

Price

$698.25 → $627.67

Mkt Cap

$65.8B

P/E

15.3x

▼ 11.9%

30D

▼ 16.4%

▼ 10.9%

VRTVertiv Holdings Co▼ 9.9%

Vertiv's 9.9% decline likely reflects investor concerns that the new CPO hire signals operational challenges requiring restructuring rather than growth-driven expansion in the competitive AI infrastructure market.

Price

$370.94 → $334.10

Mkt Cap

$128.3B

P/E

84.1x

▼ 9.2%

30D

▲ 8.7%

▲ 100.5%

DDominion Energy, Inc.▲ 8.4%

NextEra Energy's $67 billion acquisition of Dominion Energy at a premium valuation drove the stock up 8.4% today.

Price

$61.73 → $66.90

Mkt Cap

$58.9B

P/E

19.7x

▲ 6.9%

30D

▲ 7.2%

▲ 8.8%

GLWCorning Incorporated▼ 8.3%

Aschenbrenner's fund took large short positions against chipmakers, including GLW, while betting bullishly on competing compute and memory stocks.

Price

$191.81 → $175.80

Mkt Cap

$151.5B

P/E

85.1x

▼ 15.2%

30D

▲ 6.9%

▲ 116.9%

MUMicron Technology, Inc.▼ 8.3%

Chinese chipmaker CXMT's surging profits and revenue threaten Micron's memory chip market share amid intensifying AI-driven competition.

Price

$724.66 → $664.75

Mkt Cap

$750.0B

P/E

31.4x

▼ 16.4%

30D

▲ 46.1%

▲ 174.7%

NOWServiceNow, Inc.▲ 8.2%

Bank of America resumed ServiceNow coverage with a Buy rating and $130 price target, citing AI as a business beneficiary.

Price

$95.07 → $102.87

Mkt Cap

$106.1B

P/E

61.2x

▲ 12.4%

30D

▲ 6.4%

▼ 38.5%

STXSeagate Technology Holdings plc▼ 8.1%

Seagate CEO rejected factory expansion plans, citing lengthy timelines, disappointing investors despite analyst price target increases.

Price

$795.47 → $730.89

Mkt Cap

$163.8B

P/E

69.0x

▼ 12.4%

30D

▲ 33.4%

▲ 179.6%

CTSHCognizant Technology Solutions Corporation▲ 7.9%

Cognizant announced significant cost-cutting measures including up to 15,000 job cuts, improving profitability outlook and investor sentiment.

Price

$47.13 → $50.86

Mkt Cap

$24.1B

P/E

11.0x

▲ 3.3%

30D

▼ 17.0%

▼ 28.5%

TRIThomson Reuters Corporation▲ 7.6%

Thomson Reuters surged 7.6% on strong Q1 2026 earnings, accelerated AI product adoption, a 10% dividend increase, and new CoCounsel legal AI partnerships.

Price

$82.73 → $89.01

Mkt Cap

$38.9B

P/E

25.6x

▼ 0.2%

30D

▼ 4.3%

▼ 35.1%

SNDKSandisk Corporation▼ 7.4%

SanDisk fell 7.4% likely due to Western Digital's optimistic HDD outlook, signaling potential weakness in NAND flash memory demand.

Price

$1407.61 → $1303.65

Mkt Cap

$192.9B

P/E

44.5x

▼ 15.8%

30D

▲ 41.5%

▲ 390.3%

FIXComfort Systems USA, Inc.▼ 7.3%

# Comfort Systems USA (FIX) Down 7.3% Today **Hot April CPI data (3.8% YoY) raised Treasury yields and mortgage rates, pressuring FIX's construction services demand outlook.**

Price

$1992.74 → $1847.81

Mkt Cap

$65.0B

P/E

53.3x

▼ 9.1%

30D

▲ 12.0%

▲ 100.9%

FICOFair Isaac Corporation▲ 7.1%

FICO surged 7.1% likely due to the Mitek partnership announcement expanding its fraud defense marketplace offerings to enterprise clients.

Price

$1098.59 → $1176.19

Mkt Cap

$27.2B

P/E

37.3x

▲ 7.7%

30D

▲ 9.6%

▼ 33.2%

MSTRStrategy Inc▼ 7.0%

MSTR fell 7% as Bitcoin dropped below $77K, erasing gains from its $2B recent purchase and triggering broader crypto liquidations.

Price

$177.42 → $164.91

Mkt Cap

$57.8B

P/E

N/A

▼ 15.8%

30D

▼ 1.0%

▼ 15.6%

WDCWestern Digital Corporation▼ 6.6%

WDC declined despite strong Q3 AI storage demand and dividend increase, likely due to broader market concerns about inflation and bond yields outweighing positive company-specific news.

Price

$482.02 → $450.07

Mkt Cap

$154.9B

P/E

26.9x

▼ 12.7%

30D

▲ 20.8%

▲ 177.1%

QQnity Electronics, Inc.▼ 6.6%

Qnity Electronics beat Q1 earnings and raised guidance on AI demand, but the stock fell 6.6% likely due to valuation concerns following the recent 14.9% rally.

Price

$157.23 → $146.93

Mkt Cap

$30.8B

P/E

47.4x

▼ 4.1%

30D

▲ 7.8%

▲ 80.4%

BSXBoston Scientific Corporation▲ 6.5%

Boston Scientific surged 6.5% on strategic $1.5B MiRus heart valve investment and $2B share buyback announcement.

Price

$52.68 → $56.10

Mkt Cap

$83.5B

P/E

23.5x

▲ 5.1%

30D

▼ 12.7%

▼ 44.9%

ITGartner, Inc.▲ 6.4%

Gartner's Q1 earnings beat expectations on stronger profitability and free cash flow despite modest revenue decline, driving positive market sentiment.

Price

$146.23 → $155.66

Mkt Cap

$10.4B

P/E

15.4x

▲ 1.2%

30D

▲ 0.7%

▼ 31.4%

COHRCoherent Corp.▼ 6.4%

Profit-taking in AI optical-networking stocks after prominent investor Leopold Aschenbrenner exited his stakes in Coherent and peers.

Price

$382.45 → $357.99

Mkt Cap

$70.0B

P/E

170.4x

▼ 5.7%

30D

▲ 3.8%

▲ 157.4%

TERTeradyne, Inc.▼ 6.3%

Teradyne likely declined 6.3% due to profit-taking after strong momentum gains, as expensive high-flying stocks face drawdowns when market sentiment shifts.

Price

$337.88 → $316.59

Mkt Cap

$49.7B

P/E

58.7x

▼ 13.7%

30D

▼ 16.8%

▲ 89.1%

CIENCiena Corporation▼ 6.2%

None of the provided articles mention Ciena Corporation (CIEN) or explain today's 6.2% decline.

Price

$554.46 → $520.01

Mkt Cap

$73.7B

P/E

336.3x

▼ 10.6%

30D

▲ 2.5%

▲ 171.1%

PWRQuanta Services, Inc.▼ 6.1%

Comfort Systems (FIX) is outperforming PWR in the AI infrastructure boom, offering better valuation and margin expansion despite PWR's strong guidance.

Price

$769.99 → $722.91

Mkt Cap

$108.7B

P/E

99.1x

▼ 7.5%

30D

▲ 20.1%

▲ 69.4%

AMATApplied Materials, Inc.▼ 6.0%

Morgan Stanley raised WFE forecasts with stronger NAND momentum, but AMAT may have underperformed due to competitive positioning concerns versus beneficiaries like ASML.

Price

$436.62 → $410.46

Mkt Cap

$325.6B

P/E

38.7x

▼ 7.5%

30D

▲ 3.4%

▲ 79.5%

NEENextEra Energy, Inc.▼ 5.7%

NextEra's 5.7% decline likely reflects market concerns that the all-stock acquisition dilutes shareholder value despite AI-driven growth prospects.

Price

$93.36 → $88.04

Mkt Cap

$183.7B

P/E

22.4x

▼ 7.2%

30D

▼ 4.3%

▲ 2.7%

MRVLMarvell Technology, Inc.▼ 5.5%

Broader semiconductor sector weakness drove Marvell down 5.5% today, as chip stocks fell amid rising oil prices and geopolitical tensions.

Price

$176.89 → $167.15

Mkt Cap

$146.2B

P/E

54.2x

▼ 2.2%

30D

▲ 19.7%

▲ 100.3%

ETNEaton Corporation plc▼ 5.5%

Eaton fell 5.5% despite positioning itself as an AI power infrastructure play, likely due to profit-taking after recent AI stock rally and valuation concerns.

Price

$399.44 → $377.57

Mkt Cap

$146.8B

P/E

37.0x

▼ 9.9%

30D

▼ 7.1%

▲ 10.2%

MPWRMonolithic Power Systems, Inc.▼ 5.3%

MPWR declined 5.3% likely due to profit-taking after a 221% institutional-driven rally since 2023, despite strong automotive and AI growth fundamentals.

Price

$1550.02 → $1467.12

Mkt Cap

$72.1B

P/E

105.2x

▼ 11.7%

30D

▼ 0.1%

▲ 63.6%

ONON Semiconductor Corporation▼ 5.3%

ON Semiconductor is likely experiencing a profit-taking pullback after surging 60% in three months on AI datacenter and automotive demand tailwinds.

Price

$113.11 → $107.11

Mkt Cap

$41.8B

P/E

79.1x

▼ 0.1%

30D

▲ 29.0%

▲ 132.7%

VRSKVerisk Analytics, Inc.▲ 5.3%

Analysts shifted fair value estimates higher and debate surrounding AI opportunities and valuation justified increased price targets for Verisk Analytics.

Price

$162.55 → $171.12

Mkt Cap

$22.4B

P/E

26.1x

▲ 1.5%

30D

▼ 3.9%

▼ 21.9%

CPAYCorpay, Inc.▲ 5.3%

Corpay surged 5.3% after delivering a "blowout" Q1 with 25.4% revenue growth and raising full-year guidance above analyst expectations.

Price

$328.23 → $345.47

Mkt Cap

$22.6B

P/E

20.7x

▲ 1.1%

30D

▲ 3.2%

▲ 26.0%

All Reports

Updated 12:31 PM · May 18, 2026