On Thursday, a day after the NASDAQ 100 index made an all-time high (yes, you read it right, all-time high), all indices in the US collapsed like a pack of cards for no apparent reason. The S&P 500 slumped 5.9%, the largest one-day decline since 16th March. The small-cap index Russell 2000 crashed 7.57%, while the dollar had its best day since 19th March. The Dow was down a huge 1,863...