March 30, 2026 · Market Brief

Pre-Market · March 30, 2026

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Broad-based tech selloff gripped markets overnight, with the semiconductor sector taking the heaviest casualties following Google's announced memory chip innovation (TurboQuant algorithm). The SOXL semiconductor ETF cratered 14.79%, dragging down MU (-10.5%), COHR (-11.1%), LRCX (-5.7%), and TER (-7.0%) on demand destruction concerns. Beyond chips, SYY plummeted 15.7% on Jetro acquisition integration fears, while BSX (-9.2%) disappointed on mixed Watchman FLX trial data. SPY and QQQ fell 0.69% and 1.17% respectively, signaling rotation out of growth into defensive positioning amid Iran war volatility and rising rate anxiety.

Recommendation

Avoid semiconductor equipment and memory plays until the Google innovation threat clarity improves—MU, LRCX, and TER face near-term headwinds despite long-term AI tailwinds. SYY's 15.7% drop presents a potential accumulation opportunity if management can articulate clear Jetro synergy plans on the next call. Consider rotating into defensive healthcare (INSM's +5.7% on Phase IIIb data validates selective biotech strength) and quality industrials, while avoiding high-beta AI infrastructure names experiencing profit-taking volatility.

Indices & ETFs

SPY$629.70

▼ 0.69%

7D ▼ 3.9%30D ▼ 8.2%6M ▼ 5.1%

QQQ$556.01

▼ 1.17%

7D ▼ 5.4%30D ▼ 8.4%6M ▼ 7.1%

TQQQ$37.41

▼ 3.53%

7D ▼ 16.1%30D ▼ 24.5%6M ▼ 27.1%

SOXL$39.72

▼ 14.79%

7D ▼ 25.1%30D ▼ 36.7%6M ▲ 16.7%

SPX$6321.41

▼ 0.74%

7D ▼ 3.9%30D ▼ 8.1%6M ▼ 5.1%

Top Movers19 movers

SYYSysco Corporation▼ 15.7%

Sysco's 15.7% decline likely stems from investor concerns about the $29 billion Jetro acquisition's integration risks and impact on margins.

Price

$81.80 → $68.92

Mkt Cap

$33.0B

P/E

18.6x

▼ 15.5%

30D

▼ 24.4%

▼ 15.8%

COHRCoherent Corp.▼ 11.1%

Chip sector selloff deepened today, dragging down semiconductor and optical stocks including COHR despite positive NVIDIA partnership news.

Price

$243.48 → $216.52

Mkt Cap

$40.6B

P/E

212.6x

▼ 15.1%

30D

▼ 16.4%

▲ 100.5%

MUMicron Technology, Inc.▼ 10.5%

Google announced an innovation threatening memory chip demand, triggering broad semiconductor selloff that hit Micron particularly hard today.

Price

$357.22 → $319.60

Mkt Cap

$360.4B

P/E

15.1x

▼ 21.0%

30D

▼ 22.5%

▲ 95.0%

BSXBoston Scientific Corporation▼ 9.2%

Boston Scientific's Watchman FLX implant study met its primary endpoint, but mixed trial results disappointed investors expecting stronger efficacy data.

Price

$69.17 → $62.84

Mkt Cap

$93.4B

P/E

32.4x

▼ 9.6%

30D

▼ 18.2%

▼ 35.2%

SNDKSandisk Corporation▼ 8.9%

Google announced a breakthrough innovation threatening Sandisk's memory chip business, triggering broader semiconductor sector selloff.

Price

$615.83 → $561.17

Mkt Cap

$82.8B

P/E

N/A

▼ 20.1%

30D

▼ 11.7%

▲ 394.4%

MRVLMarvell Technology, Inc.▼ 8.5%

Semiconductor sector weakness and macro uncertainty outweigh Marvell's AI chip growth prospects, triggering broad chip stock selloff today.

Price

$94.88 → $86.82

Mkt Cap

$75.9B

P/E

28.3x

▼ 3.7%

30D

▲ 6.3%

▲ 5.4%

LITELumentum Holdings Inc.▼ 8.3%

Chip sector selloff pressures LITE despite positive AI manufacturing expansion announcement in North Carolina.

Price

$702.73 → $644.58

Mkt Cap

$46.2B

P/E

188.1x

▼ 11.6%

30D

▼ 8.0%

▲ 296.5%

FIXComfort Systems USA, Inc.▼ 7.3%

Market-wide tech sector weakness and concerns about AI infrastructure demand cooling, combined with broader market pullback, likely drove FIX's 7.3% decline today.

Price

$1366.77 → $1266.95

Mkt Cap

$44.7B

P/E

44.0x

▼ 10.0%

30D

▼ 11.4%

▲ 58.0%

VRTVertiv Holdings Co▼ 7.2%

Market rotation away from high-flying AI stocks toward "boring" industrials, plus profit-taking after VRT's S&P 500 inclusion and recent gains.

Price

$251.07 → $233.06

Mkt Cap

$89.3B

P/E

68.4x

▼ 9.0%

30D

▼ 8.6%

▲ 62.6%

TERTeradyne, Inc.▼ 7.0%

Google's new TurboQuant algorithm threatens to reduce AI memory requirements, pressuring semiconductor equipment demand including Teradyne.

Price

$295.61 → $274.92

Mkt Cap

$43.1B

P/E

79.5x

▼ 9.5%

30D

▼ 14.1%

▲ 104.7%

GLWCorning Incorporated▼ 6.8%

Market rotation away from tech toward dividend-paying energy stocks and metals due to Iran war volatility is pressuring GLW today.

Price

$136.81 → $127.44

Mkt Cap

$109.6B

P/E

69.7x

▼ 2.7%

30D

▼ 15.3%

▲ 58.8%

LENLennar Corporation▼ 5.8%

Lennar fell 5.8% today as sustained high interest rate fears dampened housing market prospects, compounding recent profit declines and weakness in Sunbelt markets.

Price

$90.25 → $84.98

Mkt Cap

$21.1B

P/E

12.2x

▼ 9.1%

30D

▼ 25.7%

▼ 33.4%

INSMInsmed Incorporated▲ 5.7%

Insmed stock rose on positive Phase IIIb data for Arikayce label expansion and growing Brinsupri adoption, unlocking larger treatment markets.

Price

$145.30 → $153.62

Mkt Cap

$33.1B

P/E

N/A

▲ 6.7%

30D

▲ 2.9%

▲ 8.4%

LRCXLam Research Corporation▼ 5.7%

Semiconductor sector selloff deepened today, with Google's AI memory algorithm sparking fresh concerns about chip demand across the industry.

Price

$211.41 → $199.40

Mkt Cap

$250.4B

P/E

41.0x

▼ 14.5%

30D

▼ 14.7%

▲ 52.1%

STXSeagate Technology Holdings plc▼ 5.6%

Seagate fell 5.6% amid broad semiconductor sector selloff, despite JPMorgan's bullish Overweight initiation, as investors prioritize near-term sector headwinds over long-term AI tailwinds.

Price

$380.07 → $358.64

Mkt Cap

$80.3B

P/E

40.5x

▼ 11.2%

30D

▼ 12.1%

▲ 56.5%

SMCISuper Micro Computer, Inc.▼ 5.5%

SMCI fell 5.5% due to allegations that company insiders illegally smuggled Nvidia chips to China, raising legal and compliance concerns.

Price

$21.97 → $20.76

Mkt Cap

$12.5B

P/E

15.2x

▼ 3.8%

30D

▼ 35.9%

▼ 55.2%

VSTVistra Corp.▼ 5.4%

Vistra's 5.4% decline likely stems from FERC regulatory concerns as the company faces delays in data center power infrastructure development due to PJM's proposed compliance filing.

Price

$155.48 → $147.01

Mkt Cap

$49.9B

P/E

67.6x

▼ 2.8%

30D

▼ 15.5%

▼ 25.7%

NRGNRG Energy, Inc.▼ 5.3%

Morgan Stanley's maintained "Equal Weight" rating despite raising NRG's price target suggests analyst skepticism about near-term upside potential.

Price

$147.74 → $139.95

Mkt Cap

$29.8B

P/E

35.1x

▼ 7.8%

30D

▼ 21.8%

▼ 15.4%

ONON Semiconductor Corporation▼ 5.2%

ON Semiconductor fell 5.2% amid semiconductor sector weakness triggered by China's trade barrier investigation against U.S. practices, escalating trade tensions.

Price

$58.35 → $55.29

Mkt Cap

$22.3B

P/E

190.8x

▼ 7.7%

30D

▼ 16.8%

▲ 11.1%

All Reports

Updated 12:31 PM · Mar 30, 2026