Markos Kaminis (Wall St. Greek) submits: The MBA's latest reporting of weekly mortgage activity offered up a sweet little surprise Wednesday. While the Market Composite Index fell 2.0% on a seasonally adjusted basis for the period ending April 1, there was an early Easter treat buried further within the real estate news basket. The composite index was impacted by a sharp drop-off in refinancing activity. The Refinance Index decreased 6.2% in fact, to its lowest level since February 25, 2011. Mortgage rates were relatively unchanged, w...