Trung Pham/iStock via Getty Images I've been buying B. Riley Financial 2028 5.25% Senior Notes due 08/31/2028 (NASDAQ:RILYZ). The bonds pay a $1.3125 annual coupon and are trading at$13.67 per note, $11.33 below a$25 per note liquidation price. This means a 9.6% yield on cost for what's an absurdly undervalued 55 cents on the dollar. RILYZ's yield has never been higher, with the current conundrum driven by an abnormal short interest in bonds that has ramped up volatility and made B. Riley Financial (NASDA ...