Confidence in the market for new multifamily housing weakened year-over-year in the second quarter, according to the Multifamily Market Survey (MMS) by the National Association of Home Builders (NAHB). The MMS produces two separate indices. The Multifamily Production Index (MPI) had a reading of 43, down three points year-over-year, while the Multifamily Occupancy Index (MOI)…