My Two-for-Tuesday morning train WFH reads: • 50 years. 50 facts. Indexing since 1976 . As the golden anniversary of index fund investing approaches, the strategy is widely available across and within asset classes. Its appeal is evident: Indexing is an easy-to-understand, cost-effective strategy that can offer diversification, tax efficiency, and consistent performance relative to the results of the market. ( Vanguard ) • The U.S. Is Manufacturing a Ton of Grid Batteries: Demand for energy storage is surging on the U.S. grid — and the country now has more than enough battery-making factories to meet it. Domestic energy-storage capacity is scaling fast as grid demand climbs: ( Reasons To Be Cheerful ) see also AI Is Using So Much Energy That Computing Firepower Is Running Out: The AI bubble has a physics problem: there aren’t enough megawatts on the grid. Compute-constrained means capex-constrained, which means the models won’t scale the way investors are pricing.…