The London Stock Exchange Group could rebrand itself as International Data Inc. In a decade, the company has gone from a local equities market to global information and services business. A deal to buy Citi’s bond index and analytics platform represents another bite of the cherry. Amid the seemingly unstoppable popularity of data-driven investment, the $685m (£530m) cash deal makes sense. Unlike LSE’s failed merger with Deutsche Börse, the purchase is unlikely to draw political heat.