Key Takeaways ROOT's $311.2M portfolio has 93.8% fixed-maturity securities, driving steady investment income.Reinvesting into higher-yielding bonds has boosted net investment income alongside underwriting gains.Investment income supports surplus, underwriting capacity and strategic flexibility for ROOT.Investment income remains a subtle yet important driver of ROOT Inc.’s (ROOT) overall performance. Being a technology-driven auto insurer, it aims to continually grow its book of policies, which, in turn, dri ...