A big company called UnitedHealth reported that they made more money than people thought in the first three months of this year. This made their stock price go up a lot on Tuesday. Other companies also had their stock prices change because of different reasons, some went down and some went up. Read from source...

1. The article starts with a vague and uninformative sentence that does not capture the reader's attention or provide any context about the main topic of the article, which is UnitedHealth Group's earnings report and stock performance on Tuesday. A better opening sentence could be something like: "UnitedHealth Group (NYSE:UNH) reported upbeat first-quarter earnings on Tuesday, boosting its shares by 6.2% and joining other big stocks moving higher in the market."