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The S&P 500 was flat at 4,184.47 during midday trading.
The Dow Jones Industrial Average fell 0.1% to 33,937.58.
The Nasdaq decreased 0.3% to 14,101.79.
The yield on a 10-year Treasury bond climbed 1.9% to 1.6%.
The price of gold was down 0.2% to $1,777.50.
The price for a barrel of oil rose-fell to 0.8% to $62.43.
Ad tech company Viant Technology Inc. (Nasdaq: DSP) in Irvine rose 6.5% to $33.24 per share for a market cap of $1.9 billion. Viant announced earlier in the day that it had expanded its partnership with DoubleVerify for fraud prevention integration across all Adelphic channels, including connected TV.
Irvine-based medical device maker Masimo Corp. (Nasdaq: MASI) fell 7% to $225.63 per share for a market cap of $12.4 billion. Masimo narrowly exceeded expectations in its first quarter as product sales increased, while shipping fewer technology boards compared to the same period a year ago, the company reported yesterday.