PMBS actively invests in a wide range of mortgage-related securities, aiming to generate consistent returns across market cycles. The portfolio will contain securities of varying maturities, with duration typically will range from 1 to 7 years. Up to 15 percent of the portfolio may be invested in high yield securities or unrated securities. The fund can invest without limitations in derivatives such as options, futures, and swaps. Additionally, up to 20 percent of assets may be allocated to certain complex mortgage-related securities such as interest only, principle only, or inverse floaters, and another 10% in equity instruments such as preferred securities. The Fund can also engage in short sales, buy/sell on a when-issued basis, and use various tactical investment techniques to gain market exposure. Prior to the ETF launch, the strategy was available in a mutual fund structure which started in July 1997. The fund brought over $98.2 million at the time of conversion.