Redwood Trust offered no surprises in its fourth jumbo MBS of the year, a $313.2 million deal that closely resembles the six previous transactions the firm has issued since pioneering the rebirth of the non-agency market back in 2010. With squeaky clean collateral and an investor-friendly securitization structure, Sequoia Mortgage Trust 2012-4 includes three triple-A classes totaling $290.4 million that will be supported by 7.30 percent credit enhancement. That’s the same level as in Redwood’s previous deal, significantly lower than the 8.25 percent enhancement on its first 2012 transaction and slightly above the 7.15 percent level on its second deal this year. In several areas, the latest Redwood MBS includes...