Every investor has done it at least once: seen a fund or sector on top of the performance chart, felt the pull of "everyone's making money in this, why aren't I," and moved money in near the peak. That pull has a name — recency bias — and it is one of the most expensive habits in investing.
Recency bias is a mental shortcut: we weigh recent, vivid information far more heavily than older, less exciting information. It helped humans survive in the wild — the last rustle in the grass matters more than one from six months ago. But markets don't work like survival instincts. A sector that rallied hard for two years is not more likely to keep rallying; often it is closer to the point where valuations have run ahead of fundamentals.
| Behaviour | What drives it | Usual outcome |
|---|---|---|
| Switching into last year's top fund category | Recent 1-3 year chart-topping returns | Buying near a cyclical peak |
| Exiting equity after a sharp correction | Recent painful headlines and red portfolio value | Selling near a cyclical bottom |
| Overweighting one sector or theme | Recent outperformance narrative (news, social media) | Concentration risk nobody planned for |
| Abandoning SIPs during a downturn | Recent months of falling NAV | Missing the recovery, buying high later instead of low now |
The antidote to recency bias isn't willpower — it's a written process you follow even when your gut disagrees. Decide your asset allocation and rebalancing rules when you're calm, not when a headline is loud. Review your portfolio on a fixed schedule (say, twice a year) instead of every time the market moves. And separate "informational noise" (this quarter's chart-topper) from "decision-worthy signal" (a genuine change in your goals, timeline, or risk capacity).
This ties closely into discipline around choosing the right instrument for each goal — recency bias often pushes people toward whichever option recently "felt" safest or most exciting, rather than what actually fits the timeline.
Recency bias isn't a flaw unique to inexperienced investors — professional fund managers and seasoned investors fall for it too. The difference is that disciplined investors build guardrails: asset allocation targets, rebalancing bands, and a habit of checking full-cycle data before chasing short-term charts. Your portfolio doesn't need you to predict the next winner. It needs you to not abandon a sound plan because of what happened in the last twelve months.