India's central bank is easing, and that cuts both ways for a company that is, at heart, a giant bond fund with an insurance wrapper. Falling yields lift the value of SBI Life's bond holdings as they squeeze what new policies can earn. The regulator, meanwhile, is pushing insurers toward higher-margin protection cover. Can India's biggest private life insurer turn cheaper money into richer business?

SBI Life's engine is distribution: its bancassurance tie to State Bank of India's branches reaches customers few rivals can match. Mix matters more than volume. Guaranteed savings, its biggest book, is the most rate-sensitive. Protection carries far fatter margins per rupee of premium. And the unit-linked book rides the stock market, making fee income a derivative of sentiment.