Earnings reports from nine mortgage banking operations suggest that servicing operations played a major part in the industry’s sharp downturn in profitability during the first quarter. But a new Inside Mortgage Trends analysis also identifies weakness in loan production operations and declining origination volume as key factors. The nine lenders, including the three largest firms and seven of the top 10 originators, posted a combined $1.726 billion in net servicing income during the first quarter of this year. That was down ... [includes one data chart]