Redwood Trust has packaged its fourth non-agency jumbo MBS of the past two years and achieved the lowest credit-enhancement requirement during that span thanks largely to a more appealing geographic mix of properties backing the loans. Sequoia Mortgage Trust 2012-2 looks a lot like the three previous jumbo deals Redwood has issued in its solo effort to re-ignite the non-agency MBS market. In some ways, the collateral is slightly less pristine than some of the earlier transactions, although all four have been backed by very high quality prime loans. Credit enhancement for the AAA-rated classes is 7.15...