S&P 500 component Generac advanced in early stock market trade Wednesday, on pace for a breakout from a buy zone, despite missing fourth-quarter earnings estimates. including data centers, announced early Wednesday that Q4 profit fell 42.5% to $1.61 per share with revenue declining 11% to $1.09 billion. The S&P 500 generator play said Wednesday that it residential product sales decreased approximately 23% to $572 million, compared to $743 million last year.