The largest part of the worlds economy is based upon speculation - the buying and selling of money in order to make money. In order to do this there needs to be constant movement in relative values of currencies, and the slightest excuse 'the markets' can find to drive this is pounced upon. This is why the pound fell markedly the other day, 24 hours before Theresa May was due to speak substantively for the first time about Brexit. The likes of Mr Kipling, God rest the great mans soul, who do something as crass as actually make things for sale, the people that generate real, tangible wealth in the form of things we can hold, touch, even eat, suffer as a result of the behaviour of the people that drive the market trends. We all moan, but still perpetuate the who 'system' and glibly blame other influences, from OPEC to Brexit, from China to Global Warming, when the speculators move the markets in a way that is detrimental to our interests, although it's invariably beneficial to theirs.