The growing U.S. investment pool for financial commercial real estate lending just expanded by another $3 billion as bank and non-bank lenders including investment management giant Pacific Investment Management Co., known as Pimco, broaden their offerings to tap strong demand. Pimco officially launched a real estate debt fund while insurer MetLife and bank holding company State Street Corp. kicked off a new commercial mortgage partnership. Pimco's fund is a new strategy for the firm, and the State Street-MetLife venture represents an expansion of efforts. The two deals add $3 billion for real estate.