Pacific Investment Management Co can withstand additional outflows of about $300 billion to $350 billion over the next two years before its portfolio management operation is impaired, according to research firm Morningstar Inc on Tuesday. Pimco is struggling to stem redemptions after the unexpected departure of co-founder Bill Gross on Sept. 26, an event that has triggered another round of speculation in the bond market over leadership stability and a possible separation from its parent Allianz SE.