By halting Ocwen Financial's (OCN) deal to buy a mortgage servicing portfolio from Wells Fargo (WFC), New York regulator Benjamin Lawsky has called into question the servicer's ambitious growth plans.

Lawsky's move also raises a broader question of whether there are enough other servicers to take on the nearly $1 trillion in servicing of delinquent loans that banks are expected to sell in the next few years.

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