Dec. 29 (Bloomberg) -- Diamond Foods Inc. rose after CNBC reported that hedge-fund manager David Einhorn may have taken a stake in the snack maker, citing speculation.

Diamond advanced 10 percent to $32.40 at 11:15 a.m. in New York, after earlier rising as much as 13 percent.

To contact the editor responsible for this story: James Callan at jcallan2@bloomberg.net