Bailey with Winnie in her mouth and her basket of toy treasures next to her, Geoff the Giraffe on top.
Bailey and the Case of "Irish Wolfhound Recency Bias"
We have an Irish Wolfhound named Bailey, and she has a basket full of toys she's collected over the past four or five years. It's a distinguished crew. There's Geoff the Giraffe, Wolfie, Ellie the Elephant, Monkey, and a whole supporting cast besides. Bailey knows every one of them by name. If you laid them all out and graded them, they'd all score well. Good toys, each with a loyal history.
Here's the thing. When Bailey is in a happy mood and wants to celebrate, she trots over to the basket to make a selection. Her choice, entirely. And she almost always grabs whichever toy she got most recently. The other day she marched right past Geoff, Wolfie, Ellie, and Monkey and went straight for Winnie the Pooh — her newest arrival — then curled up with him for a nap, the rest of the loyal crew sitting untouched a few feet away.
I looked at her and thought: we need a name for this. Irish Wolfhound Recency Bias.
It turns out we humans have our own version, and in investing it can get expensive.
What recency bias is
Recency bias is the tendency to overweight what just happened and discount the longer-term picture. Whatever is freshest in our minds feels the most important, the most predictive, the most right — even when the full track record says otherwise.
You see it most clearly when markets drop. The decline feels alarming and permanent, and the instinct is to do something — anything — to make the discomfort stop. But market declines are an expected, normal part of investing, not a malfunction. Many of the same people who feel that fear have lived through earlier downturns, stayed put, and watched the market move on and climb to new highs. Recency bias makes that hard-won experience easy to forget in the moment, when the recent pain crowds out the longer record of recovery.
Bailey isn't choosing Pooh because he's better than Geoff the Giraffe. She's choosing him because he's recent. Investors do the same thing, except the stakes are a bit higher than a nap.
Where it shows up in a portfolio
Two of the most reliable habits for building long-term wealth are the exact ones recency bias loves to undermine: diversification and rebalancing.
Diversification. Owning a broad mix of investments means something is always doing well — and something is always lagging. Recency bias whispers that you should ditch the laggards and pile into whatever's been hot. But that's just the Pooh instinct dressed up in market clothes. The recent winner isn't guaranteed to keep winning, and the recent laggard isn't broken — sometimes Geoff the Giraffe is exactly the toy you want next. A diversified portfolio is the whole basket, on purpose.
Rebalancing. Rebalancing is the discipline of periodically trimming what's grown large and topping up what's lagged, bringing your portfolio back to its target mix. Notice this is the opposite of what recency bias wants. It feels deeply unnatural to sell some of your best recent performer and add to the thing that's been disappointing. But that's precisely the move that keeps your risk in check and quietly enforces "buy low, sell high" instead of the reverse.
In other words, good investing often asks you to walk past the newest toy and pick from the whole basket.
The takeaway
Bailey gets a pass. She's a dog, Pooh is delightful, and no harm done. Geoff, Wolfie, Ellie, and Monkey will get their turn eventually.
For the rest of us, the lesson is worth holding onto: the most recent experience is rarely the most important one. Build a diversified portfolio, rebalance it on a schedule rather than on a feeling, and don't let the newest, shiniest thing pull you away from a basket full of perfectly good decisions.
Even our Irish Wolfhound could teach a master class in this. She just happens to be on the wrong side of the lesson.
This article is for educational and informational purposes only and does not constitute investment, tax, or legal advice, nor a recommendation to buy or sell any security or to adopt any investment strategy. Diversification and rebalancing do not ensure a profit or protect against loss. All investing involves risk, including the possible loss of principal, and past performance is not a guarantee of future results. Please consult a qualified professional regarding your individual circumstances before making any financial decisions.