100 Years of War vs the Stock Market: Why Panic Sellers Lose and SIP Investors Win

As the US-Iran conflict rattles global markets in March 2026, Brent crude sits above 100 dollars a barrel, the Sensex has plunged over 10 percent from its highs, and FIIs have pulled out over Rs 39,000 crore in just two weeks. Your WhatsApp groups are full of doomsday predictions. Your relatives are telling you to redeem everything. Social media is screaming that this time is different. But here is the thing: they said the exact same thing during every single war, conflict, and crisis of the last 100 years. And every single time, the market came back. Not most times. Every time.

100 Years of Wars, Conflicts, and Market Recoveries: The Complete Data

Before we discuss strategy, let us look at the raw data. This table covers every major global conflict from World War II to the present day — the market decline it triggered, how long recovery took, and what happened to long-term investors.

The Pattern That Has Never Been Broken

Look at the table above one more time. World wars, nuclear standoffs, oil embargoes, terrorist attacks, pandemics, full-scale invasions — the market has survived every single one. Not just survived, but thrived. The pattern is remarkably consistent: markets react sharply to fear and uncertainty, bottom out within days to weeks, and then begin a recovery that almost always delivers positive returns within 6 to 12 months. The only exception in 100 years was the 1973 oil embargo, where the conflict triggered a full-blown recession and sustained stagflation. Even then, the market eventually recovered and went on to new highs.

The Swiss Finance Institute studied this extensively and found something fascinating: markets tend to fall in the lead-up to a war and immediately after surprise attacks, but often rally once the conflict is underway. Markets fear uncertainty far more than they fear war itself. Once the situation becomes clearer — even if the news remains bad — the uncertainty premium gets priced out and buyers step in.

The Indian Market Has Its Own War Story — And It Is Remarkable

India has faced its own share of conflicts and terrorist attacks, and the market data is even more striking than global averages. The Indian stock market has not only recovered from every single conflict — in some cases, it rallied during the conflict itself.

The Kargil Miracle: When the Market Rallied 37 Percent During a War

The Kargil War of 1999 is perhaps the most powerful counter-narrative to the idea that you should sell during conflicts. When Pakistani infiltrations were discovered in April 1999, the Nifty 50 fell 16 percent. Investors panicked. Headlines screamed about nuclear risk. And then something extraordinary happened. Between May 3 and July 26, 1999 — the exact dates of the Kargil War — the Sensex surged 37 percent, rising from 3,378 to 4,687. Tata Motors alone gained 92 percent during the war period. Auto, engineering, and banking sectors led the charge.

Why did this happen? Because the market had already priced in the worst-case scenario before the war began. Once India demonstrated military resolve and the outcome became increasingly clear, the uncertainty premium evaporated. Domestic institutions stepped in, and the same investors who had sold in panic watched helplessly as the market ran away from them.

The 26/11 Paradox: Mumbai Was Under Attack, and the Market Closed Higher

On November 26, 2008, terrorists attacked multiple locations in Mumbai, including the Taj Mahal Palace Hotel, in one of the deadliest terror attacks in Indian history. The Sensex opened down 1.5 percent the next morning. By the end of the day, it had recovered and closed in the green — up 0.7 percent. Within one month, the market was up 4 percent. Within one year, the Sensex had surged 80 percent from its November 2008 levels. The investors who sold in the fear of that terrible week locked in losses at what turned out to be near the bottom of the 2008 financial crisis.

The 2008 and 2020 Crashes: When Panic Cost Real Money

While wars and conflicts typically cause temporary 5 to 15 percent corrections, the 2008 financial crisis and the 2020 COVID crash were different beasts — far deeper and far scarier. Yet even these two extreme events reinforce the same lesson.

Global Financial Crisis (2008): The 60 Percent Crash

The Sensex crashed from 21,000 in January 2008 to 8,701 in October 2008 — a 60 percent wipeout. On October 24, 2008, the Sensex fell 1,070 points in a single day, a staggering 10.96 percent decline. The Nifty 50 plunged from 6,357 to 2,253. Investor wealth was decimated. And yet — the Sensex crossed 21,000 again by 2013 and went on to 82,000 by late 2024. An SIP investor who started at the January 2008 peak — the absolute worst timing possible — generated a 12.96 percent XIRR by 2025. They created more absolute wealth than someone who started at the March 2009 bottom, because they accumulated more units during the crash.

COVID-19 Pandemic (2020): The Fastest Crash and Recovery

The Sensex crashed 38 percent from 41,000 to 25,981 in just four weeks. On March 23, 2020, it fell 3,935 points in a single day — a 13 percent decline that triggered circuit breakers. Market capitalisation equivalent to 40 percent of India's GDP was wiped out. The fear was absolute. And within 7 months, the Sensex was back at 41,000. Within 18 months, it had crossed 60,000 — a 130 percent gain from the bottom. Investors who stopped their SIPs during the March 2020 panic missed what turned out to be the greatest buying opportunity of their lifetimes.

The Hard Data on Stopping SIPs During Crises

Let us move beyond emotions and look at what actually happens to real investors who stop their SIPs during market crashes versus those who continue.

Why SIP Investors Are the Real Winners of Every War

When the Sensex falls 10 percent, your SIP instalment buys 11 percent more mutual fund units at the lower NAV. When it falls 20 percent, you get 25 percent more units. When it falls 40 percent — like in COVID — you get 67 percent more units. These extra units sit quietly in your portfolio, compounding year after year. When the market recovers — as it always does — those extra units generate outsized returns. This is rupee cost averaging, and it works precisely because you do not stop investing during scary times.

• A Rs 10,000 monthly SIP at NAV Rs 50 buys 200 units. At NAV Rs 40 (a 20 percent crash), the same Rs 10,000 buys 250 units — 50 extra units for free
• When NAV recovers to Rs 60, those 250 units are worth Rs 15,000 versus Rs 12,000 for 200 units. That is a 25 percent wealth difference from a single month's SIP
• Multiply this across 6 to 12 months of crisis and the wealth gap between continuing and stopping becomes enormous
• WhiteOak Capital data shows an SIP started at the January 2008 peak generated Rs 75.23 lakh, versus Rs 64.44 lakh for one started at the March 2009 bottom — the peak investor created more wealth because they bought more units during the crash

March 2026: The US-Iran Conflict and What It Means for Your Portfolio

The current situation is undeniably serious. Brent crude has crossed 100 dollars a barrel for the first time since 2022. The Sensex crashed 5.3 percent in the week of March 10 to 14 — its worst weekly performance in 4 years. FIIs have sold over Rs 39,000 crore in March alone. The rupee has hit a record low of 92.54 against the dollar. Oil marketing companies have fallen 7 to 8 percent. India VIX has spiked above 22.

India is particularly vulnerable because it imports over 85 percent of its crude oil. Higher oil prices simultaneously pressure inflation, corporate margins, and the currency. But here is what the data also tells us: every single oil price spike in the last 35 years has normalised within 3 to 8 months. OPEC+ has spare capacity, the US is now the world's largest oil producer, India's Strategic Petroleum Reserve covers 9.5 days of imports, and renewable energy now accounts for over 40 percent of India's power generation. The structural reduction in oil dependency is real.

The Only Exception: When a War Triggers a Recession

In the interest of intellectual honesty, there is one scenario where war-driven market recovery takes years rather than months: when the conflict triggers a full-blown recession. This happened once in 100 years — the 1973 Yom Kippur War and the OPEC oil embargo that followed. Oil prices quadrupled, inflation hit 12.5 percent, the US entered stagflation, and the S&P 500 took approximately 6 years to recover its 1973 highs. The key variable is not the severity of the conflict — it is whether the conflict causes an economic recession. Monitor this closely.

• Watch RBI's monetary policy response — continued rate cuts suggest the central bank sees no recession risk
• Monitor India's GDP growth trajectory — consensus estimates remain above 6 percent for FY27
• Track corporate earnings — Nifty 50 earnings growth of 12 to 14 percent is holding up
• Watch DII flows — as long as domestic institutional buying remains strong, the correction remains temporary
• If oil sustains above 100 dollars for more than 6 months, the risk of a recession scenario rises — but even then, SIP continuation remains the optimal strategy

Your 5-Point Action Plan for Right Now

• Continue every SIP without exception. Do not pause, do not reduce, do not redeem. This is non-negotiable. The data on stopping SIPs during crises is unambiguous — it destroys wealth
• If you have surplus cash, deploy it in tranches over the next 3 to 6 months via STP from a liquid fund to a diversified equity fund. Corrections of 10 percent or more are historically rare buying opportunities
• Increase your SIP amount if your income allows it. Even a temporary increase of 20 to 30 percent for 6 months during a correction can meaningfully boost your long-term corpus
• Stop checking your portfolio daily. Every study on investor behaviour confirms that higher checking frequency leads to worse decision-making. Check once a month or once a quarter
• Share this data with family and friends who are panicking. The biggest risk during a crisis is not the market falling — it is someone you care about making an emotional decision that derails their financial future

The Biggest Lesson From 100 Years of Data

Markets react to fear. They always have, and they always will. World War II, Kargil, 9/11, COVID, Russia-Ukraine, and now US-Iran — every conflict triggered panic, predictions of doom, and a stampede for the exits. And every single time, the investors who stayed disciplined, kept investing, and refused to let fear dictate their decisions came out wealthier on the other side. Not because they were lucky. Because that is how markets work. Volatility is not a bug — it is the price you pay for earning superior long-term returns. And SIP investors do not just pay that price — they profit from it.

In the last 100 years, every war ended. Every crisis passed. Every crash recovered. But the wealth created by disciplined, long-term investors — that compounded forever. The question is not whether the market will recover from the US-Iran conflict. It will. The question is whether you will still be invested when it does.