NSCI invest primarily in securitized credit assets, which include pools or mortgages, loans, and receivables packaged into securities like commercial and residential MBS, ABS, CMOs, and CLOs. The fund may allocate up to 50% of its assets to junk bonds rated no lower than CCC, with unrated securities capped at 25%. To boost income, the fund engages in dollar roll transactions by temporarily selling and repurchasing mortgage-backed securities. The fund also uses derivatives such as futures, options, swaps, and forward, to manage market fluctuations, credit quality, interest rates, adjust portfolio duration, or for speculative purposes aimed at increasing yield and returns. Up to 20% of the portfolio may be held in other fixed income instruments and cash equivalents like US Treasuries.