A big company called Alphabet, which owns Google, said they made more money than people thought in the last three months of last year. But, they didn't make as much from ads on their website as people expected. So, some people are worried and sold their shares, making the price go down. Other companies had good or bad news too, and some of them went up or down in price. Read from source...

1. The headline is misleading and sensationalized. It implies that crude oil prices are the main driver of the market performance, while in reality, they are only one factor among many. A more accurate title would be "U.S. Stocks Mixed as Crude Oil Drops 2%; Alphabet Shares Fall After Q4 Results".