The mood in stockmarkets has shifted from bullish to fatalistic. Everyone knows that prices may have a long way to fall after their AI-fuelled ascent. So why isn’t everyone getting out? History suggests that even if a crash is coming, markets can rally as well as plunge several times before it happens. Quitting too soon can be costly.

Ukraine’s future looks a little less bleak than at the start of the weekend, after talks with America’s secretary of state and European officials in Geneva. More even-handed revisions have been proposed to the Russia-tilted deal put forward a few days ago. Even so, damage has already been done.