How JSI Generates Income JSI generates income through securitized debt markets that most retail investors never access directly. The fund's portfolio centers on agency mortgage-backed securities from Fannie Mae ( OTCQB:FNMA) and Freddie Mac ( OTCQB:FMCC), which provide government-backed stability while delivering coupons up to 6.5%. Management supplements this core with tactical allocations to asset-backed securities, commercial mortgage debt, and collateralized loan obligations.