Investors clearly had plenty of trust in TPG RE Finance Trust (NYSE: TRTX) this week; after all, the company's shares flew nearly 8% higher over the period, according to data compiled by S&P Global Market Intelligence. The reason why wasn't hard to figure out -- the mortgage real estate investment trust (mREIT) published an investor-pleasing set of quarterly and annual operating results after market hours on Tuesday. This, plus a supplemental breakdown, revealed that TPG booked over $100 million in interest income in the fourth quarter.