FTSE 250 tumbles as Bond yields hit 15 year high
London's blue chip index edged upwards on Wednesday as BAE Systems rose amid pressure from Donald Trump on NATO to increase defence spending, but rising bond yields caused volatility elsewhere.The FTSE 100 index ended up 5.75 points, 0.1%, at 8,251.03. The FTSE 250 tumbled 398.13 points, 2.0%, at 19,952.24. The AIM All-Share fell 5.17 points, 0.7%, at 720.11.The Cboe UK 100 closed up slightly at 8