When it comes to retail giant Costco Wholesale (COST 0.36%), there are plenty of things filling up the headlines. First and foremost, Costco stock just crossed $1,000 per share for the first time. For perspective, it traded closer to $100 per share 10 years ago.Costco stock is up, simply put, because business is good. For example, in the fiscal first quarter of 2025 (which ended on Nov. 24), the company's net sales were up 7.5% year over year. That might not sound like much. But it generates over $250 billi ...