Telegraph: The global free market for food and energy is facing its biggest threat in decades as a host of countries push through draconian measures to hold down prices, raising fears of a new “resource nationalism” that could endanger world food security. India shocked the markets yesterday by suspending trading in futures contracts for a range of farm products in a bid to clamp down on alleged speculators and curb inflation, now running at 7.6pc. The country’s Forward Markets …