Mortgage rates were little changed as key economic data came in close to expectations. The Producer Price Index (PPI) for March rose 0.7%, while the more closely-watched “Core PPI“, which excludes volatile food and energy components, rose a tame 0.1%. Weekly Jobless Claims fell to 456,000, near forecast. March Existing Home Sales increased 6.8%, better than expected. Stocks fell sharply on concerns over the Greek debt crisis. No other data will be released today.