Adds details on results, share movement Feb 10 (Reuters) - PepsiCo Inc PEP.O forecast full-year earnings below analysts' estimates on Thursday, signaling that the beverage giant anticipates recent price increases to only partially offset the hit from runaway inflation. PepsiCo shares rose 1.5% in premarket trading as it also announced a 7% increase in annualized dividend and a new $10 billion stock buyback program. Still, PepsiCo's net revenue rose 12.4% to $25.25 billion in the fourth quarter ended Dec. 25 , beating analysts' estimates of $24.24 billion, according to IBES data from Refinitiv.