1. AutoZone shares fell 4.2% after fiscal Q1 earnings missed estimates. 2. Same-store sales growth of 5.5% slightly below the 5.6% estimate. 3. The company added 53 new locations in Q1, planning more expansions. 4. AutoZone has seen six consecutive quarters of same-store sales growth. 5. Competitors also experienced declines following AutoZone's earnings report.