The outlook for the U.S. higher education sector is universally grim, according to a new analysis by Moody's Investor Services. The credit rating agency has maintained a stable outlook for research universities and a negative outlook for all other universities since 2009. But earlier this week, Moody's downgraded its outlook for all of higher education, issuing an across-the-board negative verdict. A Moody's spokesperson cited poor revenue prospects as the reason for the negative outlook. "The U.S. higher education sector has hit a critical juncture in the evolution of its business model," said Eva Bogaty, assistant vice president of Moody's, in a statement. "Even market-leading universities with diversified revenue streams are facing diminished prospects for revenue growth."