The portfolio may invest in commercial paper, Treasury obligations, certificates of deposit, and
money market securities to provide income, liquidity for expense payments, and preservation of
the portfolio’s principal value. All such assets must represent maturities of one year or less at time
of purchase. Assets must be investment grade or better at the time of investment, as rated by the
two predominant rating agencies. The portfolio may not invest in short-term financial instruments
considered to contain speculative characteristics (uncertainty of principal and/or interest).