What happened Shares of Costco Wholesale (NASDAQ: COST) were up more than 2% this morning after the company reported sales results for the month of January. So what Analysts responded positively to the report, as Costco shows signs of maintaining year-over-year sales increases despite tough comparisons. The key catalysts to watch would be a possible special dividend announcement or membership fee increase, especially to combat some of the inflationary costs the company has dealt with over the last year.