S&P 500 close — Tuesday, 18 August 2026

S&P 500 closed down 0.58%

S&P 500 treemap for Tuesday, 18 August 2026: each company sized by market capitalisation and coloured by its move that day

S&P 500 movers — August 18, 2026

Of the 503 companies tracked in the S&P 500, 225 rose and 275 fell, with 3 unchanged. Energy led the day at +1.80%, while Technology lagged at -1.73%.

Top gainers · S&P 500

TRGP Targa Resources, Inc. +7.13%
PODD Insulet Corporation +5.96%
ULTA Ulta Beauty, Inc. +4.75%
INTU Intuit Inc. +4.41%
MNST Monster Beverage Corporation +4.09%
ERIE Erie Indemnity Company +3.71%
GDDY GoDaddy Inc. +3.71%
TYL Tyler Technologies, Inc. +3.66%

Top losers · S&P 500

COHR Coherent Corp. -12.75%
LITE Lumentum Holdings Inc. -9.87%
STX Seagate Technology Holdings PLC -9.16%
SNDK Sandisk Corporation -9.01%
CIEN Ciena Corporation -8.90%
TER Teradyne, Inc. -8.77%
JBL Jabil Inc. -8.45%
MRVL Marvell Technology, Inc. -7.82%

By sector

Energy +1.80%
Healthcare +1.64%
Consumer Staples +1.21%
Financials +0.41%
Communication Services +0.19%
Consumer Discretionary -0.06%
Utilities -0.39%
Real Estate -0.44%
Materials -0.87%
Industrials -1.33%
Technology -1.73%

Open the interactive S&P 500 map ← 17 Aug 2026 19 Aug 2026 →All sessions

The same session elsewhere: NASDAQ Dow Jones TSX

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