What was supposed to go up went down, or listed sideways, and what was supposed to go down went up – and up and up.... The Federal Reserve( Fed) was in the midst of its most aggressive interest-rate-hiking campaign in decades and spending by consumers and companies seemed sure to buckle. There have been few signs of that so far, though.... Throw into the mix a couple of breakthroughs in artificial intelligence – the hot new thing in the world of tech – and you had the perfect cocktail for a bu