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NEW YORK (CNNMoney.com) -- Investors helped themselves to more than just a morning cup o' joe Tuesday. Shares of Starbucks and Green Mountain Coffee Roasters advanced, as did coffee prices.
Green Mountain Coffee Roasters' (GMCR) stock, which has tumbled 27% over the past two weeks following news of a Securities and Exchange Commission investigation, closed 7.2% higher Tuesday. The buying frenzy was sparked by speculation that Nestle, the world's largest food company, was considering making a bid for the specialty coffee maker.
Green Mountain spokeswoman Maureen Martin said the company does not have a comment on the takeover rumors.
Meanwhile, shares of Starbucks (SBUX, Fortune 500) climbed more than 4% after analysts at Credit Suisse raised their earnings outlooks for the coffee giant to $1.45 a share from $1.44 a share for 2011. And for 2012, analysts expect Starbucks to earn $1.69 a share, up from their prior forecast of $1.63 a share.
"We continue to believe Starbucks offers the highest growth of [its big competitors] with relatively minimal capital requirements," wrote Credit Suisse analysts Keith Siegner and Karen Holthouse in a research note.
Last month, Starbucks and other coffee retailers, including Green Mountain and Peet's Coffee & Tea (PEET), said they would raise drink prices to offset the sharp rise in coffee prices this year.
Coffee prices have climbed more than 30% since June, amid supply concerns. Futures for December delivery rose 4% to close at $1.86 a pound Tuesday. 
| Index | Last | Change | % Change |
|---|---|---|---|
| Dow | 32,627.97 | -234.33 | -0.71% |
| Nasdaq | 13,215.24 | 99.07 | 0.76% |
| S&P 500 | 3,913.10 | -2.36 | -0.06% |
| Treasuries | 1.73 | 0.00 | 0.12% |
| Company | Price | Change | % Change |
|---|---|---|---|
| Ford Motor Co | 8.29 | 0.05 | 0.61% |
| Advanced Micro Devic... | 54.59 | 0.70 | 1.30% |
| Cisco Systems Inc | 47.49 | -2.44 | -4.89% |
| General Electric Co | 13.00 | -0.16 | -1.22% |
| Kraft Heinz Co | 27.84 | -2.20 | -7.32% |
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