Aging bull: Why this 4-year-old stock-market rally still packs a punch

The current bull market has crossed its fourth anniversary, a milestone that historically signals durability rather than exhaustion. According to Truist Advisory Services, bull markets that survive this long rarely reverse course immediately — past cycles that reached the four-year mark tended to extend further before eventually ending.

That historical pattern matters for how investors interpret today's market. Longevity alone doesn't guarantee future gains, but it does challenge the assumption that an aging rally is automatically a fragile one. Market cycles are influenced by a range of factors — earnings growth, interest rates, and economic conditions — and no single milestone determines when a bull market ends.

What to watch: whether corporate earnings continue to support current valuations, how central-bank policy evolves, and whether economic data point to slowing growth. These fundamentals, rather than the calendar, are the more meaningful guideposts for assessing the rally's staying power.