The average price target of $542.59 for Costco Wholesale indicates an upside potential from the current price of $507.26. With 17 analyst ratings, the majority being bullish or somewhat bullish, it suggests a positive short-term impact on the stock price. The decrease in the average price target by 1.01% from the previous average of $548.12 may slightly affect the stock's performance, but the overall sentiment remains positive.