RiverNorth/DoubleLine Strategic Opportunity Fund, Inc.'s OPP-P-B is an exchange-traded preferred stock in the Closed-End Fund sector. At a recent price of $17.00, OPP-P-B yields 6.98% on its $25 liquidation preference and 4.75% coupon. It trades at a discount of 32.0% to par. The issue is cumulative, perpetual (no stated maturity), callable on or after 2027-02-15. Distributions are paid quarterly. Figures are derived from market data and SEC filings; confirm details in the prospectus before investing.