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AutoZone, Dropbox and Kroger are the Yahoo Finance charts of the day.

Let's check out the Yahoo Finance charts of the day.

AutoZone (AZO): Shares are down in early trade,  at around .38%.  Deutsche Bank upgraded the automotive part retailer, noting improved comparable store sales and better fundamentals for the company.

Dropbox (DBX): Shares up here, at around 4.9%.  Dropbox was upgraded to "buy" from "hold" at Jefferies which said the upgrade was "based entirely on valuation", following a price decline of roughly 16% which provides an attractive entry point for the data storage company.

 Kroger (KR): Shares are down here, at around .12%.  Kroger launched a new delivery service called "Kroger Ship" as part of its Restock Kroger initiative to redefine the customer experience and expand its digital footprint.

For more on today's big stock movers check out the Final Round, live at 3:55 p.m. ET, right here on Yahoo Finance.