Caffeine addicts beware: the price of coffee has risen 17% this year. Brazil has been hit by the wrong type of weather, the kind of excuse normally attributed to delays on the UK’s rail network. There are now concerns about next year’s coffee crop as Brazil and Vietnam - two major producing regions - have suffered dry conditions which may have damaged coffee plants. Exchange-traded product ETFS Coffee (COFF) moves in line with a coffee price index. If coffee prices go up, so does this product - it declines if coffee prices fall.