Harvesting profits

  The worst drought in Russia for a century looks like it could reduce the country's massive grain crop by around a quarter. In order to conserve local supplies, the Russian government has put in place an export ban that will run until the end of the year. Russia is a major exporter of grain and the disruption to the world's supply has had a sharp impact on prices. US wheat futures are up more than 80% since mid-June, the fastest rally in nearly 40 years. Other crops including barley, corn and rapeseed have also jumped higher.  The main beneficiaries of all this have been investors...