India’s stock market hit an all-time high valuation of $3.8 trillion this week, a perfectly timed billboard for Modi as the G-20 summit gives him another opportunity to showcase the nation’s potential as a geopolitical juggernaut. With the West looking to curb China’s influence, Modi has rolled out a mix of tariffs and incentives to lure companies to make in India and firms including Apple Inc. and Samsung Electronics Co. are among those expanding production in the nation.