AutoZone is a long-established company. The stock has some merits and some concerns for investors.AutoZone (AZO 1.50%) stirred some investor nerves recently after its latest earnings report, but the fundamentals still offer promising reasons to pay attention.Let's dig into two green flags in favor of owning AZO -- and one clear red flag that tempers the bullish case.Green flag 1: Growth via expansion, not just the status quoEven as same‑store sales growth moderates, AutoZone is leaning into expansion as a l ...