NEW YORK (AP) — Total U.S. money market mutual fund assets rose $60 million to $2.574 trillion for the week that ended Wednesday, the Investment Company Institute said Thursday.

Assets of the nation's retail money market mutual funds rose $1.12 billion to $887.7 billion, the Washington-based mutual fund trade group said. Assets of taxable money market funds in the retail category rose $600 million to $698.3 billion. Tax-exempt retail fund assets rose $510 million to $189.41 billion.

Meanwhile, assets of institutional money market funds fell $1.06 billion to $1.686 trillion. Among institutional funds, taxable money market fund assets fell $230 million to $1.603 trillion. Assets of tax-exempt funds fell $820 million to $83.09 billion.

The seven-day average yield on money market mutual funds was unchanged at 0.02 percent in the week that ended Tuesday from the previous week, according to Money Fund Report, a service of iMoneyNet Inc. in Westborough, Mass.

The 30-day average yield was unchanged from last week at 0.03 percent. The seven-day compounded was flat at 0.02 percent. The 30-day compounded yield was unchanged at 0.03 percent, Money Fund Report said.

The average maturity of portfolios held by money market mutual funds rose to 47 days from 46 days.

The online service said its survey of 100 leading commercial banks, savings and loan associations and savings banks in the nation's 10 largest markets showed the annual percentage yield available on money market accounts was unchanged at 0.12 percent from the previous week.

The North Palm Beach, Fla.-based unit of Bankrate Inc. said the annual percentage yield available on interest-bearing checking accounts was flat from the week before at 0.05 percent. said the annual percentage yield on six-month certificates of deposit was unchanged from the previous week at 0.2 percent. It was flat at 0.31 percent on one-year CDs and 0.48 on two-year CDs. It fell to 0.47 percent from 0.48 percent on two-and-a-half-year CDs. It was unchanged at 1.03 percent on five-year CDs.