GDP, growth, and how it all connects to the market
The answer
GDP is the total value of everything a country produces in a period. Growth is the change in it after removing inflation. It reaches your portfolio through one chain: interest rates change bond yields, bond yields change the rate at which future profits are discounted, and that changes what any company is worth today — long before any of it appears in a GDP release.
Why this costs you money
Two mistakes, and the second one is expensive for decades.
The first is trading the print. GDP is published with a long delay, covers a period that has already ended, and is revised repeatedly afterwards. By the time the number arrives, the market has been pricing an estimate of it for months.
The second is assuming growth means returns. This is the sentence: "India is growing at 7% and America is growing at 2%, so Indian equities must do better." It is intuitive and it does not follow.
A country's GDP growth includes companies that are not listed, companies that will list later, and companies that fund their growth by issuing new shares, which dilutes the shareholders who were already there. Your return comes from the profit per share of companies you own, and from what you paid for it. High national growth financed by continuous share issuance can produce very ordinary returns for existing shareholders, and has done so in large fast-growing economies for long periods.
The practical loss is paying a high price for an index because the country's growth rate is high. Growth is in the numerator of your return. The price you paid is in the denominator, and the denominator has usually mattered more.
How it works
What GDP is
GDP = Consumption + Investment + Government spending + (Exports − Imports)
Nominal GDP is measured at current prices. Real GDP removes inflation and is the number quoted as "growth". The difference between the 2 is the GDP deflator, a third inflation measure with a different basket again. GDP per capita divides by population, and for a country with a growing population it is a very different number — the one that describes whether individual lives are improving.
What a recession is
The common definition — 2 consecutive quarters of falling real GDP — is a shorthand, not the official definition anywhere.
In the United States, recessions are dated by the Business Cycle Dating Committee of the National Bureau of Economic Research, a private body. It looks for a significant decline in activity spread across the economy, lasting more than a few months, using employment, real income, industrial production and sales as well as GDP. It dates recessions long after they begin.
India has no equivalent official dating body, and Indian recessions are described using GDP growth alone. That is one reason Indian and American commentary about "recession" is often comparing different things.
The chain from a rate decision to your portfolio
This is the part worth memorising. A rate change reaches a share price by 2 separate routes, at 2 completely different speeds.
Route 1: the discount rate. Instant.
Policy rate → government bond yields → the rate at which all future cash is discounted → the price of every asset with future cash flows
A company's value today is its future profits, converted into today's money at some rate. Raise that rate and every future profit is worth less today. Nothing about the company has changed. This route works in seconds, which is why an index moves during a press conference.
It also explains something confusing: the further away a company's profits are, the more its price moves. A company expected to earn most of its profit 10 years from now is far more sensitive to the discount rate than one earning it next year. This is why fast-growing companies fall hardest when rates rise.
Route 2: the profit route. Slow.
Policy rate → borrowing costs → less investment and less consumer spending → lower revenue → lower profits → lower share prices
This takes 4 to 8 quarters, and shows up in the GDP data long after route 1 finished its work.
Risk-on and risk-off
These 2 phrases describe money moving between assets with different sensitivity to bad outcomes. In risk-off, investors sell shares, high-yield bonds and emerging market currencies, and buy government bonds of large stable countries, the dollar, and sometimes gold. In risk-on, the reverse.
The important part for an Indian investor: in risk-off, foreign investors sell Indian shares and buy dollars. That is 2 pressures at once from a single event that may have nothing to do with India.
Why the market is not the economy
An index is a small number of large listed companies, weighted by market value. An economy includes agriculture, small businesses, the informal sector and the government. In India a large share of employment is in agriculture and small enterprise, almost none of it listed. In the United States, S&P 500 companies earn a substantial share of revenue outside America. So an index can rise while an economy stalls, and fall in a year the economy grows.
What it tells you, and what it does not
A GDP number tells you what already happened, subject to revision. India revises quarterly estimates repeatedly, and the United States publishes 3 estimates of each quarter before annual revisions.
It does not tell you about company profits. Profits are a share of GDP, and that share moves. Profits can rise faster than GDP for years and then fall faster.
It does not tell you about your index. The composition of an index and the composition of an economy are different, and the gap is largest in the countries changing fastest.
Growth forecasts are not accurate. Both central banks publish them and both revise them, frequently by more than the number being forecast.
The decision rule
Separate the 2 routes when you look at a market move.
If bond yields moved, the discount rate route is at work. Expect the largest moves in companies whose profits are furthest in the future, and the smallest in companies earning cash today. This happens the same day.
If bond yields did not move, look for the profit route, and expect it to be about a specific industry rather than the whole market.
And when somebody argues for an investment from a national growth rate, ask the 2 questions that convert growth into returns: what am I paying for the earnings, and how many new shares will be issued between now and then?
Try this now
Five minutes, and it makes the chain visible in your own account.
- Sort your holdings by how indebted they are. Your broker app or a stock screener shows debt-to-equity. Rank them from most indebted to least.
- Beside each one, note where its profits are expected to come from. A company profitable today and one expected to be profitable in 5 years go in different groups. A high price-to-earnings ratio is a rough marker that the profits are in the future.
- Find the date of the last policy rate decision in your market.
- Pull up your holdings' price moves on that date and the day after, and the index move on the same dates. Subtract the index move from each holding.
- Compare the residual moves against your ranking from steps 1 and 2.
What you should see. On a day when the decision or the language surprised the market, the residual moves will line up with your ranking. The most indebted companies, and the ones whose profits are furthest away, will have moved the most, in the direction the rate surprise implies. Companies earning steady cash today will barely have moved.
If the decision was fully expected you will see almost nothing, and that is also the correct result. It tells you the market had already priced it.
Do this once and "the market fell on the rate decision" stops being a headline and becomes a mechanism you can locate inside your own holdings.
Three real cases
1. The United States, first and second quarters of 2022 — the recession that was not declared US real GDP fell in both quarters. By the popular shorthand that is a recession, and it was widely reported as one. The National Bureau of Economic Research never declared a recession for that period. Employment grew strongly throughout, real income held up, and industrial production rose. On the committee's broader criteria the economy was not contracting. The 2-quarter rule is a summary, not a definition.
2. India, 2020 and 2021 — the market is not the economy India's real GDP contracted at the sharpest quarterly rate on record in the quarter ending June 2020, of the order of 24%. Over roughly the same period Indian equity indices rose strongly from their March 2020 lows and went on to make new highs. The listed market is concentrated in large formal-sector companies that were less damaged and in some cases gained share from smaller competitors, and interest rates had been cut sharply, which lifted valuations through the discount rate route while the economy was still contracting.
3. The United States, calendar year 2022 — the discount rate route, isolated The Federal Reserve raised rates rapidly through 2022. Over the year the technology-heavy Nasdaq Composite fell about 33%, the S&P 500 about 19%, and the Dow Jones Industrial Average about 9%. All 3 indices contain companies in the same economy, with the same inflation and the same consumers. The difference between minus 33% and minus 9% is almost entirely how far in the future each group's profits sit.
The question that resolves it
A novice sees a market move on economic news and asks: is the economy getting better or worse?
An expert asks: did the discount rate change, or did expected profits change?
The 2 produce different moves, in different assets, over different time scales. The first is instant and mostly affects the price you would pay. The second is slow and affects what you are buying.
What would make this wrong
If share prices tracked GDP growth, the last 2 cases above would be impossible. Similar examples exist in most decades. Any framework that predicts markets from national growth rates has to explain a contracting economy with a rising index, and it cannot.
Three limits. The chain is a simplification — real market moves mix both routes with sentiment, positioning and flows that no framework captures. Duration sensitivity is a tendency, not a law: companies with distant profits usually move more when rates change, but in a given episode something specific to them may dominate. And GDP is a flawed measure that is still the best one — it counts spending on repairing damage as output, misses unpaid work and much of the informal economy, and is not a measure of welfare.
In India
GDP is published by the National Statistical Office. Quarterly estimates arrive about 2 months after the quarter ends. India's fiscal year runs from 1 April to 31 March, so "FY26" means the year ending 31 March 2026, and Indian quarterly figures are quoted as year-on-year growth rather than as annualised quarterly rates.
India's nominal GDP is in the region of $4 trillion, placing it among the largest 5 economies, and it has been growing in real terms well above the global average .
Three features of the Indian chain differ from the American one.
The RBI publishes its own GDP growth projections in every policy statement. Those move markets more than the GDP release itself, because they arrive earlier and carry a policy implication.
Foreign portfolio flows amplify everything. Daily net buying and selling by foreign investors is published by the exchanges. On a global risk-off day the selling reaches Indian shares and the rupee at the same time.
The Union Budget on 1 February re-prices sectors within hours. There is no American equivalent of a single date with that concentration of fiscal information.
In the United States
GDP is published by the Bureau of Economic Analysis, in 3 successive estimates for each quarter, quoted as a seasonally adjusted annual rate. A quarter that grew 0.5% is reported as roughly 2% growth, so the 2 countries' quarterly numbers are not directly comparable. US nominal GDP is above $30 trillion, the largest in the world.
Three features of the American chain.
The monthly employment report often matters more than GDP, because the Fed has an employment mandate and the jobs data is faster.
The Treasury yield curve is the transmission mechanism. The 10-year Treasury yield is a reference rate for a large part of the world's asset pricing, not only America's.
Corporate guidance carries the profit route. US companies forecast their own next quarter, so the profit effect of a rate change appears in company statements before it appears in national accounts.
Where they differ, and what that tells you
The composition differs. India's listed market under-represents agriculture and the informal economy, which are a large part of GDP and of employment. The US listed market over-represents companies earning revenue outside America. In neither country is the index a picture of the country.
The measurement conventions differ. Year-on-year in India, annualised quarter-on-quarter in the United States. Reading an Indian 7% and an American 2.5% as directly comparable is a mistake.
The external channel differs. A change in US interest rates changes Indian asset prices through capital flows and through the rupee. A change in Indian interest rates does not move American asset prices. The chain runs mostly one way.
What that tells you. If you invest in India, you have to watch 2 central banks. The RBI sets your borrowing costs. The Federal Reserve sets a large part of the discount rate applied to your holdings, through its effect on global capital and on the rupee. An American investor can mostly watch one.
That is the whole cluster in one sentence, and it is why the economy behind the market is worth learning even if you never trade a macroeconomic release in your life.
Carry this
- Two routes from a rate decision to a price: the discount rate, instantly, and profits, over 2 years.
- The further away a company's profits, the more its price moves on rates.
- Growth is not returns. The price you pay decides more than the growth rate does.