0833 ET - AutoZone shares are up in early trading, even after its F4Q same-store sales missed Wall Street estimates. An 8.6% sales increase in its domestic commercial business implies slightly negative same-store sales for its core do-it-yourself segment, Mizuho analyst David Bellinger says in a note, also mentioning that operating expenses were elevated, though offset by tariffs refunds. "We question shares initially up on this print," he says. The stock ticks up 1.3% premarket.