Assets of the nation’s 439 money market...

Assets of the nation’s 439 money market mutual funds rose $908.7 million in the latest week, the Investment Company Institute said. The rise to $266.28 billion in the seven-day period ended Wednesday followed a revised $1.88-billion decline in the funds’ assets the previous week. The seven-day average yield on money market mutual funds rose in the week ended Tuesday to 6.56% from 6.5% the previous week, according to Donoghue’s Money Fund Report, a trade journal based in Holliston, Mass. The 30-day average yield rose to 6.46% from 6.39%, Donoghue’s said.