Reuters, Getty Images The two investment giants report fourth-quarter earnings mid-January.They may seem more prestigious than plain-vanilla deposit-taking banks, but Morgan Stanley and Goldman Sachs face the same headwinds as their peers as earnings season gets underway. Both face one-time dings from the tax changes, as reported in December. And both have excellent prospects for 2018, if stronger economic growth around the world, stronger inflation, and choppier markets emerge as expected.via