Charles Schwab added the Dodge & Cox Stock Fund to its $1.4 billion 401(k) plan, replacing the Mutual Qualified fund. The plan now has 13 investment options. The Mutual funds investment style was too midcap-oriented, said Walter Gendell, vice president of benefits. The plan also dropped the Westcore Small-Cap Opportunity fund due to personnel turnover, the funds performance and a low level of interest from participants, he said. Dean Graves, an official at Westcore parent Denver Investment Advisors, did not respond for comment by press time.