A sandcastle shaped like an old man
The older a CEO becomes, the worse they are at their job, a recent study of executives' performance found.

Two or three years ago, it's hard to pinpoint exactly when, employees at an investment firm started to notice something was wrong with their aging CEO.

The executive, an octogenarian who'd founded the firm decades earlier, was trying to make nonsensical trades that employees had to scramble to cancel, a senior employee said. The CEO's relationship with the truth was growing ever more elastic. They'd forget what happened in meetings. Most concerningly, some major clients were abruptly pulling out after taking phone calls with the CEO.