By Saurav Mehra Equity markets can remain expensive for long periods, which makes it difficult to know when high valuations have become a genuine portfolio risk. Investors often make one of two mistakes: they either continue increasing equity exposure simply because prices are rising, or they exit aggressively because they believe the market has reached a peak.
A better approach is portfolio rebalancing.
When valuations become stretched and equity allocation rises well above the investor’s original target, rebalancing can reduce risk without requiring a prediction about the exact market top.
High Valuation Is a Risk Signal, Not a Sell Signal
A high market valuation does not automatically mean stocks will fall immediately.
Markets can remain expensive while earnings continue growing. Investor optimism can also keep valuation multiples elevated for months or even years.
This is why valuation should be treated as a risk-management signal, not as a precise market-timing tool.
For mutual fund investors, the important questions are:
- Has the equity allocation moved significantly above the original target?
- Are valuations much higher than their long-term range?
- Has recent portfolio growth made future financial goals more vulnerable to a correction?
If several of these conditions exist together, rebalancing may be more sensible than trying to predict whether the market has already peaked.
Start With the Original Asset Allocation
Rebalancing begins with the investor’s planned allocation rather than the market index.
Suppose an investor originally chose:
Equity mutual funds: 70%
Debt investments: 30%
After a strong equity rally, the portfolio becomes:
Equity: 82%
Debt: 18%
The investor is now taking considerably more equity risk than originally intended.
If the portfolio value is ₹20 lakh, the current allocation is:
Equity: ₹16.4 lakh
Debt: ₹3.6 lakh
To return to a 70:30 allocation, the target equity amount would be ₹14 lakh and debt ₹6 lakh.
The investor could therefore gradually shift around ₹2.4 lakh from equity toward debt or other lower-risk assets, subject to taxes, exit loads and financial goals.
The reason for rebalancing is not that the market must fall. It is that the portfolio no longer matches the investor’s desired risk level.
Market-Wide Valuation Can Provide an Additional Warning
Investors can use broad valuation indicators to understand whether optimism is unusually high.
Common measures include:
- Price-to-earnings ratio, or P/E
- Price-to-book ratio
- Earnings yield
- Market capitalisation relative to economic output
- Valuation compared with historical averages
A high index P/E means investors are paying more for each rupee of current earnings.
For example:
Index level: 30,000
Index EPS: 750
P/E = 30,000 ÷ 750 = 40 times
If the same market historically traded closer to 20–25 times earnings, a P/E of 40 could indicate substantial optimism.
But historical comparisons should be used carefully. Sector composition, interest rates, profitability and business quality can change over time.
Valuation therefore becomes more useful when combined with asset allocation and earnings expectations.
Watch for Valuation Expansion Without Similar Earnings Growth
A rising market is healthier when company earnings are also rising strongly.
Consider two situations.
Market A
Index rises 25%
Corporate earnings rise 23%
Most of the market rise is supported by earnings.
Market B
Index rises 25%
Corporate earnings rise only 5%
In Market B, much of the increase has come from investors paying higher valuation multiples.
This is known as multiple expansion.
When share prices repeatedly rise much faster than underlying earnings, expected future returns can become less attractive and the portfolio may become more vulnerable to disappointment.
That can be a sensible time to review whether equity exposure has become excessive.
Extreme Optimism Across Several Segments Deserves Attention
Peak valuations are not always visible only in large-cap indices.
Sometimes excessive enthusiasm becomes particularly strong in:
- Small-cap funds
- Mid-cap funds
- Sectoral funds
- Thematic funds
- Newly popular industries
A portfolio may therefore look reasonably diversified at the asset-class level while carrying substantial risk inside equities.
Suppose an investor has:
70% equity
30% debt
At first glance, this matches the target allocation.
But within the 70% equity portion:
- 35% is in small-cap funds
- 20% is in mid-cap funds
- 15% is in a thematic fund
The portfolio may still be much more aggressive than intended.
Rebalancing should therefore examine both equity versus debt and allocation within equity.
Strong Recent Returns Can Distort Portfolio Risk
One reason rebalancing becomes important near expensive market phases is that the best-performing assets naturally become larger parts of the portfolio.
Suppose an investor starts with:
Large-cap fund: ₹4 lakh
Mid-cap fund: ₹3 lakh
Debt fund: ₹3 lakh
After a major rally:
Large-cap: ₹5 lakh
Mid-cap: ₹6 lakh
Debt: ₹3.2 lakh
Mid-cap exposure has become much more dominant without the investor deliberately choosing to increase it.
Rebalancing may involve reducing part of the oversized position and directing money toward underrepresented assets.
This forces an investor to follow a useful discipline:
Trim assets that have become excessively large and add to assets that have become relatively underweight.
Rebalancing Does Not Always Require Selling
Investors often assume rebalancing means selling mutual fund units.
That is not always necessary.
Suppose equity exposure has risen above target. Instead of immediately selling, an investor can temporarily redirect new monthly investments toward debt funds or other underweight assets.
For example:
Current allocation: 78% equity, 22% debt
Target: 70% equity, 30% debt
The investor could:
- Pause additional equity purchases temporarily
- Direct new SIP money toward debt
- Use bonuses or lump-sum savings to strengthen the debt allocation
Over time, this can bring the portfolio closer to its target with fewer taxable transactions.
This approach can be particularly useful for investors who are still actively accumulating wealth.
Goal Proximity Makes Rebalancing More Important
Valuation concerns become much more important when a financial goal is approaching.
Suppose an investor needs money for a child’s education in two years and 80% of the required corpus remains in equity funds after a strong market rally.
Even if the long-term equity outlook is positive, a major correction shortly before the goal date could create a serious problem.
As a goal approaches, investors generally need to reduce dependence on market performance.
The closer the goal, the more important it becomes to protect accumulated gains.
This principle applies to:
- Education expenses
- House down payments
- Retirement
- Major medical or family commitments
- Other fixed-date financial goals
A market with expensive valuations can make this transition even more important.
Use Rebalancing Bands Instead of Emotional Decisions
Investors can make rebalancing more disciplined by setting predetermined limits.
Suppose the target equity allocation is 60%.
An investor might establish a rebalancing band of plus or minus 5 percentage points.
This means action is considered when equity falls below 55% or rises above 65%.
If a strong market rally pushes equity to 68%, the investor rebalances toward 60%.
This method has several advantages:
- Reduces emotional decisions
- Avoids constant trading
- Prevents allocation from drifting excessively
- Creates a repeatable investment process
The exact band depends on the investor’s risk tolerance, portfolio size and tax considerations.
Sectoral and Thematic Funds Need Extra Attention
Sectoral funds can become particularly risky near valuation peaks because their performance depends heavily on one part of the economy.
A banking, technology, infrastructure or defence-themed fund may perform exceptionally well for a few years and grow into a large part of the portfolio.
Investors should ask:
- Has the fund become too large relative to total investments?
- Is the sector trading at unusually high valuations?
- Are earnings actually keeping pace with share-price gains?
- Would a sector correction materially damage an important financial goal?
A sector being fundamentally attractive does not mean an investor should allow it to dominate the portfolio.
Avoid Rebalancing Entirely Based on Headlines
Market commentary often becomes most optimistic near strong rallies and most pessimistic after corrections.
Investors should therefore avoid changing asset allocation simply because commentators say the market is expensive.
A better rebalancing decision combines:
- Current portfolio allocation
- Financial goals
- Investment horizon
- Valuation
- Earnings outlook
- Risk tolerance
- Tax consequences
Valuation alone is not enough.
Consider Taxes and Exit Loads
Selling mutual fund units can have financial consequences.
Depending on the investment type and holding period, an investor may face:
- Capital gains tax
- Exit loads
- Transaction-related costs
Therefore, rebalancing should be done efficiently.
Possible methods include:
- Redirecting new SIPs
- Rebalancing through fresh investments
- Selling gradually
- Harvesting gains in stages
- Adjusting allocations during annual portfolio reviews
Tax considerations should not prevent necessary risk management, but they should influence how rebalancing is implemented.
Rebalancing Can Also Happen After Market Falls
Rebalancing works in both directions.
Suppose a major market correction reduces equity from 60% of the portfolio to 48%.
If the investor’s risk tolerance and long-term goals remain unchanged, rebalancing back toward 60% may require buying equities when valuations are lower.
This demonstrates why rebalancing is different from market timing.
Near expensive markets, investors trim excessive equity exposure.
After major declines, they may add equity.
The process is based on maintaining the planned risk level rather than forecasting short-term movements.
Practical Signs That Rebalancing May Be Appropriate
Investors should review their mutual fund portfolio when several of these conditions appear:
- Equity allocation exceeds the planned target
- Mid-cap or small-cap exposure has become unusually large
- Market valuations are significantly above historical norms
- Share prices are rising much faster than corporate earnings
- One sector or theme dominates the portfolio
- Major financial goals are approaching
- Recent gains have materially changed the investor’s risk exposure
- Debt or other defensive assets have become too small a portion of the portfolio
These signals do not prove that the market has peaked. They indicate that portfolio risk may have increased enough to justify action.
FAQs
Q1. Should investors stop equity SIPs when market valuations are very high?
Not automatically. Long-term SIP investors generally benefit from maintaining discipline. If equity allocation has already moved above target, new contributions can temporarily be directed toward underweight assets rather than completely abandoning the investment plan.
Q2. How often should a mutual fund portfolio be rebalanced?
An annual review is sufficient for many long-term investors, although a portfolio can also be reviewed when allocations move significantly outside predetermined ranges. Checking too frequently can encourage unnecessary trading.
Q3. Should investors move completely to debt when markets appear overvalued?
Usually not unless the investor’s financial situation requires very low risk. Complete exits depend on successfully predicting both when to sell and when to return. Rebalancing reduces excessive exposure without turning the entire strategy into a market-timing decision.
Rajesh Vats