definiens: means ( i ) Dollars, ( ii ) securities issued or directly and fully guaranteed or insured by the United States government or any agency or instrumentality thereof ( provided that the full faith and credit of the United States is pledged in support thereof ) having maturities of not more than 6 months from the date of acquisition, ( iii ) certificat es of deposit and eurodollar time deposits with maturities of 6 months or less from the date of acquisition, bankers ’ acceptances with maturities not exceeding 6 months and overnight bank deposits, in each case with any domestic commercial bank having capi tal and surplus in excess of $ 500,000,000 and a Thompson Bank Watch Rating of or better, ( iv ) repurchase obligations with a term of not more than 7 days for underlying securities of the types described in clauses ( ii ) and ( iii ) above entered into with any financial institution meeting the qualifications specified in clause ( iii ) above, ( v ) commercial paper having the highest rating obtainable from Moody ’s Investors Service, Inc. or Standard & Poor ’s Ratings Group and in each case maturing within 6 month s after the date of acquisition and ( vi ) money market funds at least 95 % of the assets of which constitute Cash Equivalents of the kinds described in clauses ( i ) — ( v ) of this definition