The downturn in shares of Kraft Heinz Co.  (KHC) - Get Report  has slowed but it hasn't stopped Monday, falling another 2% to $34.24 after analysts at Bernstein downgraded the stock to market perform from outperform following its much weaker-than-expected fourth-quarter results.

The firm said that Kraft Heinz has limited visibility going forward and it's less bullish on the stock. Bernstein has a $39 price target. 

The consumer products company got a vote of confidence from institutional shareholder Warren Buffett Monday when he said that he has "absolutely no intention" of selling his stake in the company, though he did admit that he likely overpaid for his roughly 27% holding in the company. 

TheStreet's Jim Cramer was more bearish on the packaged food giant, noting that the company not only missed on the bottom line but that it is also the subject of a Securites and Exchange Commission. Kraft Heinz also had to write down $15 billion and it said it was cutting its dividend by a third to 40 cents per share from 62.5 cents.

"There is reverence no more. Instead, there is just intense derision, as seven different firms took it from buy to hold as recognition set in that its style of making acquisitions and then cutting costs has failed to generate any growth at all. Its earnings before interest, taxes, depreciation and amortization (Ebitda) have been flat over five years and its stock has declined from $72.96 on its first day of trading as a joint entity, to $38.24, a 45% loss," Cramer said. 

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