Economists and policymakers got what they were looking for Monday: a clear uptick in the housing market. The catch is, few believe it's sustainable.

Linthicum-based Ciena announced Monday that it has won a bid to buy a major piece of bankrupt Canadian tech firm Nortel Networks.

Freddie Mac, the government-backed mortgage finance giant, said Monday it's trying to minimize losses on more than $1 billion in assets at risk because of the summer collapse of mortgage lender Taylor, Bean & Whitaker and a regional bank with which it did business.