The Fund's investment strategy focuses on International with 0.89% total expense ratio. The minimum amount to invest in Columbia Acorn Trust: Columbia Acorn International Select; Institutional 3 Class Shares is $1,000,000 on a standard taxable account. Columbia Acorn Trust: Columbia Acorn International Select; Institutional 3 Class Shares seeks long-term growth of capital by investing primarily in the stocks of medium- to larger-sized companies based in developed markets outside the U.S. CSIRX invests in at least three countries.