Valero Energy Corporation (VLO Quick QuoteVLO - Free Report) , is an independent oil refiner. The company has a Zacks Value and Momentum score of ‘A’. It’s experiencing rising earnings estimates and major stock price appreciation. Among independent refiners, Valero has the most diversified refinery base and a significant dividend yield.  

Western Digital (WDC Quick QuoteWDC - Free Report) , is one of the largest hard disk drive (HDD) producers in the U.S. This Zacks Rank #1, Strong Buy, is experiencing healthy demand in its end-markets for high capacity enterprise hard drives and flash-based products. The company’s strong cash balance of $6.27 billion and positive operating cash flow of $1.18 billion at the end of second-quarter of fiscal 2018 have enabled it to grow through acquisitions. These strategic takeovers are expected to provide the company with a competitive edge.  

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Last year, it generated $8 billion in global revenues. By 2020, it's predicted to blast through the roof to $47 billion. Famed investor Mark Cuban says it will produce "the world's first trillionaires," but that should still leave plenty of money for regular investors who make the right trades early.

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