A mortgage securitization option, launched by the Chicago Federal Home Loan Bank to compliment its popular Mortgage Partnership Finance program, appears to be foundering after seeing only limited use in 2003. And many questions surround the future of the MBS program. The Shared Funding or MBS option for the MPF program was unveiled early last year. But as 2003 wore on and MPF volume soared to record levels, there were only two offerings of