NEW YORK (TheStreet) -- Shares of Valero Energy Corp. (VLO - Get Report) are down -2.06% to $48.90 in pre-market trading after the company warned late Monday that second quarter profit from continuing operations will be in a range of $1.10 to $1.25 per share, which falls short of the $1.39 per share estimate of analysts surveyed by Reuters.

Valero cited seasonal weakness in its biggest Gulf Coast market.

The company also said it expects to report a loss from discontinued operations of $63 million, or 12 cents per share, related primarily to a non-cash charge associated with the closure of its Aruba refinery.

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Separately, TheStreet Ratings team rates VALERO ENERGY CORP as a Buy with a ratings score of A-. TheStreet Ratings Team has this to say about their recommendation:

"We rate VALERO ENERGY CORP (VLO) a BUY. This is based on the convergence of positive investment measures, which should help this stock outperform the majority of stocks that we rate. The company's strengths can be seen in multiple areas, such as its revenue growth, solid stock price performance, growth in earnings per share, increase in net income and attractive valuation levels. We feel these strengths outweigh the fact that the company shows weak operating cash flow.

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