The positive earnings report and optimistic future guidance from Ross Stores indicate a strong financial health and growth potential, which typically would lead to a positive short-term impact on the stock price. However, the slight drop in share price on the day of the announcement suggests a possible short-term market adjustment or profit-taking. The significant analyst upgrades in price targets reflect confidence in the company's long-term prospects, which should positively influence investor sentiment and potentially the stock price in the short term.