Recency Bias

Recency bias is the habit of treating the latest result as the trend - the fund that topped last year becomes the plan and the current run becomes the forecast. The most recent data point is not the distribution.

BehaviouralLast reviewed 2026-10-04

What it is

Recency bias is the weighting of the latest events and the latest performance far above the long-run record. The fund that topped the tables last year becomes the plan, the market's current run becomes the forecast, and the decade of data that came before is skimmed past. It is a memory problem wearing an investing problem's clothes: the recent window is vivid, available and wrong in proportion.

In Australia the bias runs through the super choice form. Switching funds every two years chasing last year's top performer drags the long-term return through fees and missed recovery, because the performance that produced the top year has usually already happened. Fund rankings are a rear-view mirror: the decade-average row in the comparison table is the row that predicts anything, and it is the row the eye skips.

Key takeaways

Recency bias weights the latest result far above the long-run record - the rear-view mirror as a plan.
Switching super funds every two years chasing last year's top performer costs fees and missed recovery.
Fund performance that produced a top year has usually already happened by the time you see it.
The decade-average row predicts more than the one-year row, and the eye skips it.
Pick a diversified option, rebalance on a schedule, and let the forecast be a spreadsheet, not a feeling.

How it works

The mechanism is an attention filter: the most recent window dominates the judgement. A fund that returned 15 percent last year feels like a 15 percent fund, even when the decade around it averages 6. The persistence problem is the measured version: top-quartile funds rarely stay top-quartile, and the SPIVA scorecards have shown active funds underperforming their indexes after fees year after year, which means the top year is usually the peak of a cycle rather than the start of one.

The arithmetic prices the chase. A super option returns 15 percent in the top year; an investor who switches in after it captures the following five years at the fund's decade average of roughly 6 percent - $100,000 grows to roughly $133,800. The investor who held a diversified index at its long-run 8.5 percent reaches roughly $150,400 over the same five years. The chase cost the gap, plus the switching fees and the insurance reset that came with the move.

The forecast version runs the same maths on the market. Five strong years at 12 percent becomes a plan built on 12 percent forever: $100,000 at 12 percent for 20 years compounds to roughly $964,600, while the same money at a realistic 8.5 percent compounds to roughly $511,200. The $453,000 gap is the recency premium, and the portfolio rebalancing entry covers the schedule that stops the plan drifting toward the recent window.

Why it matters

For an Australian reader, recency bias is the reason the super choice form is filled in after a strong year and the reason the market forecast on the news sounds plausible. The comparison tables invite the one-year sort, and the one-year sort is the trap: performance chasing has a measurable cost in fees, insurance resets and missed recovery. The superannuation fund fees entry covers what a switch costs, and the fee drag compounds exactly like the return does.

A colleague named Brent (yes, that Brent) switched super funds twice in four years, chasing each year's top performer, and arrived after each run had finished. Both switches reset his insurance and cost fees; neither switch captured the year he was buying. The fund he left outperformed the fund he bought in both cases, which is the persistence problem working exactly as advertised. The highest-leverage thing most Australians can do is pick a diversified option, automate the contributions, and rebalance on a calendar rather than on the news. The portfolio rebalancing entry covers the drift the schedule fixes.

Real-world examples

The 15 percent top year versus the decade average

A super option returns 15 percent in its top year and averages roughly 6 percent across its decade. The investor who switches in after the top year captures the following five at roughly 6 percent: $100,000 grows to roughly $133,800. A diversified index at its 8.5 percent long-run average grows the same $100,000 to roughly $150,400 over the same five years. The gap is the cost of buying the recent window, before the switching fees and the insurance reset are counted.

The forecast built on five strong years

Five years at 12 percent becomes a 20-year plan built on 12 percent: $100,000 compounds to roughly $964,600 on the assumption. At a realistic 8.5 percent, the same money compounds to roughly $511,200. The $453,000 gap is the recency premium, and it is the difference between a plan and a hope. The decade average is the row that predicts; the recent window is the row that sells.

The bear-market memory

After a crash, the recent memory says equities are broken: $100,000 moved to cash at the bottom earns 4 percent while the market it left recovers 50 percent over the following two years. The cash balance reaches roughly $104,000 at the end of year two; the market position would have reached $150,000 before any further growth. The recency bias priced the future on the most painful data point in the series, and the recovery happened without the holder.

Common mistakes

Mistake: Switching super funds every two years chasing last year's top performer.

Why it bites you: The performance has usually already happened, and the switch drags the long-term return through fees and missed recovery. Brent paid for both switches and captured neither run.

Mistake: Building a 20-year plan on the last five years.

Why it bites you: A 12 percent assumption against a realistic 8.5 percent overstates a 20-year outcome by roughly $453,000 on $100,000. The recency premium is the largest single error in most retirement spreadsheets. Check the decade row before the plan is built.

Mistake: Reading a fund's one-year number as its permanent character.

Why it bites you: Top-quartile persistence is weak: the year that produced the ranking is usually the peak of a cycle. The decade-average row is the one that predicts.

Mistake: Selling the diversified option after a bad year.

Why it bites you: The bad year is the most recent data point, not the distribution. Selling after it converts a temporary drawdown into a permanent loss plus a late re-entry. The recovery maths needs 100 percent after a 50 percent fall.

Ivy's take

I spent an evening sorting every option in my super fund's comparison table by last year's return, then by the ten-year return, so you don't have to. The two sorts produced almost no overlap at the top, which is the persistence problem in one spreadsheet. The fund that topped the one-year column sat in the third quartile of the ten-year one.

I ran Brent's two switches through the same table and both arrived after the run. What I have stopped doing is reading the recent column at all before checking the decade one - the order matters, because the eye anchors on whatever it sees first. Pick the diversified option, automate the contributions, and let the calendar do the rebalancing.

Related jargon, defined

Performance chasing: Buying the fund or asset that recently topped the tables.
Mean reversion: The tendency of extreme results to drift back toward the long-run average.
SPIVA scorecards: The annual scorecards measuring active funds against their indexes after fees.
Tracking difference: The gap between what a fund returns and what its index returns.
Your Future Your Super: The APRA performance test comparing MySuper products against a benchmark.
Portfolio rebalancing: Restoring target weights on a schedule, which stops drift toward the recent winners.

Frequently asked questions

What is recency bias in investing?+

It is the habit of weighting the latest performance far above the long-run record. The fund that topped last year becomes the plan, and the decade around it is skimmed past.

Why does chasing last year's best super fund fail?+

The performance that produced the top year has usually already happened, and top-quartile persistence is weak. The switch adds fees and insurance resets to a return that was never forward-looking.

How often should I switch super funds?+

Rarely, and never on performance alone: fees, insurance and the decade-average row decide the move. A switch made on the news is a switch made on the most recent data point.

Does recency bias affect market forecasts?+

Yes: five strong years become a 12 percent assumption, and the 20-year plan overstates the outcome by roughly $453,000 on $100,000. The decade average is the number that predicts.

How do I avoid recency bias?+

Sort the comparison table by the decade row first, pick a diversified option, and rebalance on a calendar. The order matters because the eye anchors on whatever it sees first.

Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

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