Rebalancing: Selling Winners, Buying Losers

Meera started three years ago with a simple plan: 60% of her money in equity mutual funds and 40% in a debt fund, a steady mix she could sleep with. Then came a long, happy bull run. Equity kept climbing, she never touched it, and the split quietly slid to 75% equity and 25% debt without her doing a single thing. It felt great, because the part that grew was the part she had most of. What Meera did not notice is that her "balanced" portfolio had silently turned into an aggressive one. She had drifted into more risk than she ever signed up for, and the market chose the risk for her.

That quiet drift is what this chapter is about, and the cure is a slightly uncomfortable habit called rebalancing.

What rebalancing actually is

Rebalancing is simple to say and a little hard to do. You pick a target mix, say 60% equity and 40% debt. Over time the market pushes those weights around. Rebalancing is the act of periodically nudging them back to target: you trim whatever ran up and top up whatever lagged, until the split matches your plan again.

That is the whole idea. You are not predicting anything. You are not timing the top. You are just refusing to let the market quietly redraw your plan for you.

The word "balanced" is doing real work here. A 60/40 portfolio is a deliberate statement about how much risk you want to carry. The moment it becomes 75/25, that statement is no longer true. Rebalancing is how you make the statement true again.

Why this controls risk

Here is the part most beginners miss. A drifting allocation does not just change your numbers, it changes your exposure to the next crash.

When Meera's mix slid to 75/25, three-quarters of her money was now riding on equity. If a fall like 2020 arrived, where the NIFTY dropped roughly 38% in a few weeks, her 75% equity sleeve would take a far bigger bite out of her total than the 60% she had planned for. The runaway winner becomes the runaway risk. The very success that made her comfortable is what made her fragile.

Rebalancing quietly does two protective things at once. It caps how large any one risky sleeve can grow, so a crash can never hurt you more than your plan allows. And because you sell a little equity when it is high and buy when it is low, it nudges you to "sell dear, buy cheap" by rule rather than by mood, which is exactly the discipline most of us lack in the moment.

Why it feels so wrong

If rebalancing is this sensible, why does almost nobody enjoy doing it? Because it asks you to do two things that feel backwards.

You sell your best performer. Equity has been the star for three years, every news channel is cheering it, and you are being told to trim it. It feels like benching your top player.

You buy the laggard. Debt, or gold, or whatever lagged, looks dull and disappointing, and you are adding money to it. It feels like rewarding failure.

Your gut screams "ride the winner, dump the loser." Rebalancing calmly says the opposite. That discomfort is not a bug; it is the signal that you are doing the unglamorous, contrarian thing that protects you. Selling some of what everyone loves and topping up what everyone ignores is precisely how you avoid being maximally exposed at the top.

A worked example, step by step

Let us put real rupees on Meera's story. These are illustrative numbers, not advice.

She started with Rs 10,00,000: Rs 6,00,000 in equity (60%) and Rs 4,00,000 in debt (40%). After the bull run, her equity doubled to Rs 12,00,000 while debt sat at Rs 4,00,000. Her total is now Rs 16,00,000, and the mix has drifted to 75/25.

To get back to 60/40 on the new total, she needs Rs 9,60,000 in equity and Rs 6,40,000 in debt. So she sells Rs 2,40,000 of equity (locking in some of the run, near the highs) and moves it into debt.

Notice she did not sell everything or guess the top. She just trimmed enough to be on plan again, and she did it by selling high.

Calendar vs threshold: two simple methods

There are two common ways to decide when to rebalance.

Calendar rebalancing is the easy one: pick a date, say once a year, and reset to target on that day regardless of what the market did. Simple, predictable, hard to overthink.

Threshold (or band) rebalancing triggers on drift instead of dates: you act only when a sleeve wanders, say, 5 to 10 percentage points off target. A 60% equity sleeve might have a band of 50% to 70%, and you rebalance only when it breaks out of that band. This reacts to big moves faster but needs you to check now and then.

How often a beginner should really do it

Here is the honest answer most beginners need to hear: once a year is plenty. A calm annual check, on a date you will remember, will capture almost all of rebalancing's benefit.

Why not more often? Because every rebalance has friction. Selling equity can trigger capital-gains tax, there are exit loads on some funds, and there are transaction charges. Rebalance every month and you pay these frictions over and over for a benefit that barely moves. The discipline is worth a lot; the over-tinkering is not.

How the four user types see it

Rebalancing is mainly an investor's tool. For others, the same "don't let one thing dominate" instinct shows up differently.

When this fails

Rebalancing is a discipline, not magic, and it has real limits.

Costs and taxes can eat the benefit if you do it too eagerly. In India, selling equity may attract capital-gains tax and exit loads, so frequent rebalancing can quietly hand back much of what it saved. Lean toward an annual reset, use fresh SIP money to top up the laggard where you can (so you buy without selling), and let your bands be wide enough that you act only on real drift.

Rebalancing into a structurally broken asset is dangerous. The whole method assumes your sleeves are sound, diversified things like a broad equity fund and a quality debt fund. It works because those swing around a healthy long-term path. If you "rebalance" by pouring money into a single collapsing stock or a fund that is genuinely deteriorating, you are not buying low, you are catching a falling knife. Rebalance between sound asset classes, never into a story that is actually breaking.

And rebalancing says nothing about which assets to own. It only manages the proportions of a sensible mix you already chose. Pick that mix carelessly and a tidy rebalance just keeps a bad plan on schedule. This chapter is education, not personalised advice; your own mix depends on your goals, horizon and the rest of your life.

Quick self-check