These seven large-cap stocks were the best performers in the last week. Are they in your portfolio? United Airlines Holdings, Inc. (NASDAQ:UAL) surged 21.79% last week after reporting first-quarter earnings. Revenue of $12.539 billion beat the consensus estimate of $12.4 billion, and adjusted EPS loss of $(0.15) beat the estimate of $(0.57). Several analysts raised their forecasts for the stock. UnitedHealth Group Incorporated (NYSE:UNH) increased 12.43% during the week thanks to better-than-expected revenue in the first quarter. The company is still dealing with the ...