Jefferies analyst Christopher Mandeville recommends buying shares of Casey's General Stores on weakness ahead of this morning's earnings conference call. Despite a $6.6M inventory adjustment, earnings and EBITDA "beat soundly" as Casey's provided "impressive" expense control and "outsized" fuel margins, Mandeville tells investors in a research note. Further, potentially positive quarter-to-date color on the call and confirmation of an imminent loyalty launch "should only help" the stock, adds the analyst. He keeps a Buy rating on Casey's General Stores with a $192 price target.