Checking your portfolio too often is a fast way to hurt long term returns. The article explains why – and how to stay focused when markets move.

To President Prabowo Subianto's team, the response to Indonesia’s worst equity shows a decisive leader who acted quickly to stem the losses and hold officials accountable.

ILLUSTRATION BY RUTH MACAPAGAL A founder I once advised built a nine-figure empire over four decades. Disciplined. Strategic. Admired. When I asked him privately: “What happens to this company if you ...