S&P 500 close — Monday, 17 August 2026

S&P 500 closed down 0.53%

S&P 500 treemap for Monday, 17 August 2026: each company sized by market capitalisation and coloured by its move that day

S&P 500 movers — August 17, 2026

Of the 503 companies tracked in the S&P 500, 132 rose and 369 fell, with 2 unchanged. Energy led the day at +0.88%, while Consumer Staples lagged at -2.14%.

Top gainers · S&P 500

SNDK Sandisk Corporation +8.88%
COHR Coherent Corp. +7.79%
FIX Comfort Systems USA, Inc. +6.04%
TER Teradyne, Inc. +5.81%
AMAT Applied Materials, Inc. +5.55%
MRVL Marvell Technology, Inc. +5.54%
WDC Western Digital Corporation +5.35%
PWR Quanta Services, Inc. +5.33%

Top losers · S&P 500

RDDT Reddit, Inc. -7.63%
CVNA Carvana Co. -7.28%
CHTR Charter Communications, Inc. -6.59%
STZ Constellation Brands, Inc. -6.19%
ALGN Align Technology, Inc. -5.60%
TTD The Trade Desk, Inc. -5.23%
NOW ServiceNow, Inc. -5.08%
TAP Molson Coors Beverage Company -4.75%

By sector

Energy +0.88%
Industrials -0.17%
Healthcare -0.19%
Technology -0.35%
Utilities -0.38%
Materials -0.48%
Communication Services -0.81%
Real Estate -0.87%
Financials -1.01%
Consumer Discretionary -1.02%
Consumer Staples -2.14%

Open the interactive S&P 500 map ← 14 Aug 2026 18 Aug 2026 →All sessions

The same session elsewhere: NASDAQ Dow Jones TSX

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