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BOSTON ( TheStreet) --'s stock-rating model upgraded Buckeye GP Holdings ( BGH) to "buy." The company owns general-partner interests in Buckeye Partners ( BPL), which transports and stores refined petroleum products, and is also rated "buy."

The numbers: Second-quarter revenue fell 29% to $351 million, but net income surged 84% to $9.7 million, or 35 cents a share. Its gross margin rose from 16% to 25% and its operating margin climbed from 12% to 19%. The company has a weak financial position, demonstrated by its quick ratio of 0.5 and debt-to-equity ratio of 6.3.

The stock: Buckeye GP Holdings is up 78% this year, beating major U.S. indices. The stock trades at a price-to-earnings ratio of 18, a discount to oil and gas storage peers and the market. The shares pay a cash distribution yield of 6.5%. Cash distributions are taxed differently than dividends.

The model upgraded IntegraMed America ( INMD), a provider of vein care and fertility services, to "buy."

The numbers: Second-quarter net income ascended 23% to $1.1 million and earnings per share climbed 30% to 13 cents. Revenue grew 13% to $56 million. Its gross margin was little changed at 13% and its operating margin remained stable at 4%. A quick ratio of 0.7 indicates less-than-ideal liquidity. A debt-to-equity ratio of 0.5 reflects conservative leverage.

The stock: IntegraMed America is up 27% this year, more than the Dow Jones Industrial Average and S&P 500 Index. The stock trades at a price-to-earnings ratio of 19, indicating parity with the market, but a premium to health-care-service peers.

The model upgraded gold explorer Jaguar Mining ( JAG) to "hold."

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