Jean-Michel Paul There was a time when Belgium was at Europe’s vanguard. It was the second country in the world to industrialize, the founder of art deco and surrealism, and a producer of Nobel scientists who discovered — among other things — the God particle. I was born and bred in this country, but I fear we are now trailblazing …

The leading academic theory of asset bubbles is that they don’t really exist. When asset prices skyrocket, say mainstream theorists, it might mean that some piece of news makes rational investors realize that fundamental values like corporate earnings are going to be a lot higher than anyone had expected. Or perhaps some condition in the economy might make investors suddenly …

BLOOMBERG Saudi stocks led Middle Eastern markets lower as oil languished near $40 a barrel and the Easter weekend holiday in Europe sapped volumes. Equities in Dubai extended the longest losing streak in more than two months. The Tadawul All Share Index sank for a fourth day, losing 1.7 percent to 6,244.60 as of 3:17 p.m. in Riyadh. Jabal Omar …