Lenders are largely optimistic about the issuance of commercial mortgage-backed securities, with one-third surveyed predicting between $30 billion and $50 billion this year, according to Jones Lang LaSalle. Its sentiment survey at a recent Mortgage Bankers Association meeting also found nearly 27% of respondents expected issuance in the range of $20 billion to $30 billion, and more than 19.2% eyeing more than $50 billion. Nearly have of those surveyed said they expect originations will continue to grow in 2012, topping $50 billion.