Sensex down 8% due to Iran war: Should you pause SIP or buy the dip?

Let's be honest - geopolitical anxiety has become a permanent fixture of modern investing. It began in earnest in 2022, when Russia invaded Ukraine in the largest and deadliest conflict Europe has seen since World War II. The Global Geopolitical Risk Index has been running at elevated levels ever since. The world is simply more volatile than it was a decade ago - and investors need to make peace with that reality.

The Iran-Israel war has added another layer of uncertainty and caused broad-based selling across global markets. For India, the concern is specific: rising crude oil prices. With crude accounting for roughly 30% of India's total import bill, any sustained spike has cascading effects on inflation, the rupee, the current account deficit, and ultimately, on corporate earnings.

Markets have absorbed shocks like these before, and they will again. The question is never whether turbulence will come. It is whether you are prepared for it when it does. That preparation - that strategic clarity - is what separates long-term wealth builders from investors who simply react. 

2026 has not been kind to investors. The BSE Sensex is down 8.2%, and the Nifty 50 has declined 7.21% year-to-date (as on 10th March). But here is what is important to understand - this is not a verdict on India's fundamentals. It is the collateral damage of a war India did not create. The shockwaves through oil prices, supply chain disruptions, and global risk sentiment, are real, but they are caused by external forces. 

"The market has a short memory for geopolitical events, but a long memory for earnings and growth." 

Your portfolio may be bleeding red. The financial news cycle is doing what it always does - amplifying every dip, every fear, every worst-case scenario. But you don’t need to panic. Tune the noise out and remember - the markets have a short memory for geopolitical events, but a long memory for earnings and growth. India's economic fundamentals have not changed because of a war in the Middle East.

That said, this is a good moment to review your portfolio. Is it well-diversified? Is it aligned to your actual risk profile? Are your fund managers keeping true to their stated investment objectives? These are the questions worth asking. Not "should I exit?"

On SIPs specifically, the answer is straightforward. SIPs deliver their full value only when you continue investing across market cycles, especially the difficult ones. When markets fall, your fixed investment amount buys more units, bringing your average cost of purchase down. That is rupee cost averaging at work, and a falling market is, quite literally, the mechanism through which it delivers returns.

History has shown, investors who maintained their SIPs through full market cycles over a 25-year horizon have consistently delivered 15–16% annualized returns. The ones who paused, stopped, or switched during downturns consistently underperformed. Often locking in losses at exactly the wrong moment.

The message is simple: keep calm, do not stop your SIPs, and judge your funds by their fundamentals - not by last month's NAV. 

"When markets fall, the same SIP amount can buy more units — averaging your cost and leaving more room for upside." 

Rebalancing a portfolio is an important aspect of managing your investments. But there is a right way and a wrong way to rebalance your portfolio during a geopolitical shock, and most investors instinctively gravitate toward the wrong one.

Markets fall; you feel the panic and sell equity funds and pile into gold or debt. This feels rational in the moment, but it rarely is.  

“The most common mistake investors make during falling markets and elevated uncertainty is buying losers and selling winners.”  

What you are actually doing is selling assets (like equity) at a discount more than their fundamentals justify. And instead, you are moving your money into assets that everyone has already bought, and the uncertainty premium is already factored into their pricing. This is reactive rebalancing, and it is driven by fear.  

Strategic rebalancing on the other hand looks at your portfolio through an analytical lens. If your portfolio has drifted from your defined allocation, then rebalancing the funds to maintain its optimal asset allocation is a good idea. Let’s say, if your portfolio has become equity-heavy after years of gains, it would be a good idea to sell equity funds and add debt and gold. Any dip thereafter will actually be a natural moment to rebalance back. Not to exit entirely.

Should you have gold funds in your mutual fund portfolio? Of course. History has proven gold's role as a portfolio diversifier, especially in geopolitically stressed environments because, unlike bonds or equities, gold does not rely on the solvency or goodwill of any issuer. It is a safe haven when geopolitical tensions are elevated and acts as a hedge against inflation. But should you sell your equity funds and pile up gold ones? The answer is NO.  

A war or a shock event is a reason to check whether your portfolio has drifted from your plan. They are not the reasons to abandon the plan altogether. 

A falling market is the time to move toward quality, size, and diversification within equity, not to exit from equity altogether. Not all equity mutual funds are created equal, and some can actually work in your favour during the downturn. Generally, large-cap and flexi-cap funds offer the most resilience during turbulence, with value funds as a complementary layer for those seeking further downside protection.

Mid and small-cap funds and certain thematic funds are the hardest hit during downturn. This doesn’t mean you should let go completely of mid or small-cap funds. But adding them to your portfolios during a panic-driven downturn without adequate risk appetite is inadvisable.

Depending on your risk capacity and time horizon, you should consider the right mutual fund categories. This table should guide you on your options for investing in mutual funds according to your current situation. 

If you are new to investing, watching your portfolio turn red a week or month after you invested can be stressful and even nerve wracking. But it’s not unusual. And it definitely is not the reason to sell and abandon your plan.

As a new investor, the one most important thing that you need to understand and internalise is – a falling market and red portfolio is not a loss, until you sell. 

Create a mutual fund portfolio that matches both your risk tolerance and time horizon Make it well-diversified across asset classes and geographies. Once you’ve done that, stay disciplined. Start SIPs and continue them, even in the falling markets.

While we all would like to time the market and buy when the markets are down and sell when they are up. But, that is practically impossible. The “perfect time” to invest is as soon as you have the money.