Apollo Global Management (APO) stock has done well this year, as the company’s role in the private credit and insurance industries has improved. It has risen by 50%, beating the S&P 500 and Nasdaq 100 indices, which have risen by less than 25%. Apollo’s gains continued recently after the management inked a $25 billion deal with Citigroup, one of the top American banks. The deal will see the two companies finance various debt opportunities, mostly in the United States. Apollo also aims to double its assets in the next few years, a move that will see it manage over $1.3 trillion, joining Blackst…