The S&P 500 was up 0.8% in midday trading to 2,181.69.
The Dow Jones Industrial Average was up 0.9% to 18,517.06.
The NASDAQ was up 1.1% to 5,224.79.
The yield on a 10-year Treasury bond was up 4.9% to 1.58%.
The price of gold was down 1.7% to $1,344.
Santa Ana-based Universal Electronics was down 4.5% to $74.11 and a $1.1 billion market cap. The remote control products maker said net income in its most recent quarter fell about 11% to $6.6 million, compared with $8.4 million for the same period last year.
Irvine-based Autobytel Inc. was up 16.6% to $17.81 and a $191 million market cap. The automobile sales leads provider reported a 19% increase in revenue to $36 million for its most recent quarter, compared with about $30 million year-over-year.
Anaheim-based Willdan Group Inc. was up 26% to $12.99 and a $107 million market cap. The engineering services company earned $3.2 million on revenue of about $59 million in its most recent quarter, compared with earnings of $1.6 million on revenue of about $37 million in the same period last year.