In Monday's analysts' actions, AutoZone (AZO) and Delta Air Lines (DAL) are getting some positive nods from Wall Street firms, while Union Pacific (UNP) sees its ratings lowered. Oppenheimer upgraded AutoZone to OUTPERFORM from PERFORM with a $850 price target. Analysts said the company is one of the 'best-run and most return disciplined retailers.' Looking ahead, Oppenheimer noted that sales will be boosted by better product availability. The firm is especially bullish on the company's new strategic initiatives. In another note, Deutsche Bank lifted Delta Air Lines' price target to $51 from $50 due to lower fuel prices. Analysts said the company reported better-than-expected revenue trends for the month of September. The firm is keeping its BUY rating on the stock, but some risks include economic uncertainty and government regulation. Meanwhile, analysts are not so optimistic on Union Pacific's path. The railroad company was downgraded at Barclays to EQUAL WEIGHT from OVERWEIGHT and its price target dropped to $92 from $108. Some industrial headwinds include the strong U.S. dollar and higher relative inventory levels. Adding to that, analysts cited softer trucking data. TheStreet’s U-Jin Lee reports from New York.