More people than expected showed up at the Mortgage Bankers Association annual convention this week in Chicago – including intermittent Occupy protestors – given the hugely uncertain prospects facing the industry. MBA economists are predicting less than $1 trillion in new originations in 2012, which would be the lowest new production volume since 1997, and all three major components in the business – origination, servicing and secondary marketing – face huge structural challenges that so far are still just vaguely mapped out. Yet attendance was up about 18 percent from last year, and several observers noted that investors are...