If you’ve set up a mix of EPF, PRS, ASNB funds, and perhaps direct equities or other unit trusts, that mix doesn’t stay put on its own – and rebalancing is the discipline of bringing it back in line with what you originally intended.
Why Allocations Drift
Say you started with a target of 60 percent growth-oriented investments and 40 percent conservative ones. If the growth portion performs well over a year, it might now represent 70 percent of your portfolio – not because you decided to take on more risk, but simply because it grew faster. Left unchecked, your risk level creeps upward or downward without any deliberate decision on your part.
What Rebalancing Actually Does
Selling a portion of what’s grown and reallocating to what’s lagged, to restore your original target mix. It’s mechanically the opposite of “let your winners run,” and that’s the point – rebalancing is a risk-management discipline, not a return-maximizing one. In practice it tends to enforce a mild sell-high, buy-low behavior, since you’re trimming whatever has outperformed.
How Often to Do It
There’s no single correct interval, but two common approaches work well for most people. Calendar-based: review and rebalance once a year, on a fixed date you won’t forget, a birthday, the start of the year. Threshold-based: rebalance whenever an asset class drifts more than a set amount, commonly five percentage points, from its target – this reacts to actual market movement rather than an arbitrary date, at the cost of needing to check more often.
For most people without a large, actively-traded portfolio, annual calendar-based rebalancing is simple enough to actually stick to, which matters more than theoretical optimality.
A Note Specific to the Malaysian Context
EPF and ASNB balances aren’t something you actively rebalance in the traditional sense – you don’t sell EPF holdings to buy something else. Rebalancing mainly applies to the portion of your portfolio you control directly: PRS fund selection, many providers let you shift between conservative, moderate, and growth funds, unit trusts, and direct equities. Treat EPF and ASNB as a relatively fixed, conservative base, and do your active rebalancing within the remainder.
Don’t Over-Manage It
Rebalancing too frequently mostly adds transaction costs and effort without a meaningful benefit over a well-chosen annual or threshold-based schedule. If you find yourself checking allocations monthly just in case, that’s usually more about anxiety than strategy.