Group 1 - The preferred stock of Chimera (NYSE: CIM.PR.A) was recommended for purchase due to its 10.2% dividend yield and a wide margin of safety for the dividend [1] - Since the recommendation, the stock has provided significant returns [1] Group 2 - The author has a background in chemical engineering and economics, and has written multiple books on investing and mathematics [1] - The author emphasizes the importance of fundamental and technical analysis in investment decisions [1]

Core Insights - The preferred stock of Chimera (NYSE: CIM.PR.D) was recommended for its 10.0% dividend yield and a significant margin of safety in the dividend [1] Group 1 - The preferred stock has provided outstanding returns since the initial recommendation [1] - The author has a background in chemical engineering and economics, indicating a strong analytical foundation for investment decisions [1] - The author emphasizes the importance of fundamental and technical analysis in investment strategies, particularly using options for both investing and trading [1]