Few words move markets and headlines quite like recession. It turns up in news bulletins, in central bank speeches and in the worried questions people ask about their jobs and savings. Yet for something so widely discussed, it is often loosely understood. For a new trader, knowing what a recession actually is, how it is measured and how markets tend to behave around one is a solid foundation for reading almost everything else.
The simple definition
At its heart, a recession is a sustained fall in economic activity. Fewer goods are made, fewer services are sold, businesses invest less and, usually, unemployment rises. The economy shrinks rather than grows.
In the UK and much of Europe, the common rule of thumb is two consecutive quarters of falling gross domestic product, or GDP, which is the total value of everything an economy produces. If GDP shrinks in, say, the spring and then again in the summer, the economy is described as being in a technical recession.
The United States does things slightly differently. There, a committee at the National Bureau of Economic Research looks at a broad range of data, including jobs, incomes, spending and industrial output, and decides after the event when a recession started and ended. That means the official American verdict can arrive months after the downturn has begun.
Why the definition is imperfect
The two-quarter rule is neat, but it can mislead. An economy can shrink very slightly for two quarters while employment stays strong, which hardly feels like a crisis. Equally, growth can be weak but just positive while households feel real pain from rising prices. GDP figures are also revised, sometimes significantly, so a recession can appear or vanish in later estimates. Our guide to how UK monthly GDP differs from quarterly GDP explains why the early numbers deserve some caution.
This is why economists and traders look beyond the headline. Jobs data, business surveys, retail spending and lending conditions all help build a fuller picture.
What tends to cause a recession
Recessions rarely have a single cause. Common triggers include a sharp rise in interest rates that squeezes borrowers, an energy or commodity price shock, a financial crisis that freezes lending, or a sudden collapse in confidence. Often it is a mix. When borrowing costs rise and prices stay high at the same time, households cut back, businesses delay hiring and the slowdown can feed on itself.
The combination of weak growth and stubborn inflation has its own name, and our explainer on stagflation covers why it is so awkward for central banks.
How markets usually react
Markets try to look ahead, so prices often move well before a recession is confirmed. Share prices can fall as investors expect lower profits, and sectors tied closely to the economic cycle, such as housebuilders, retailers and industrial firms, tend to feel it first. Defensive areas like utilities, healthcare and consumer staples have historically held up better, although that is never guaranteed.
Government bonds often rally when recession fears grow, because investors expect central banks to cut interest rates eventually. In currency markets, money can drift towards perceived safe havens. Commodities linked to growth, such as industrial metals and oil, can weaken as demand expectations fall.
It is worth knowing that a fall in share prices is not the same as a recession. A drop of 20% or more from a recent high is often labelled a bear market, and our piece on bull and bear markets explains the difference. Bear markets can happen without a recession, and recessions do not always produce deep bear markets.
Why the timing is so hard
One of the frustrating truths about recessions is that they are much easier to spot in hindsight. Forecasters frequently disagree, and well-known warning signs can flash for long periods without a downturn following. Markets can also begin recovering while the economic data still looks grim, because traders are already pricing the next upturn.
For a beginner, that means treating recession talk as context rather than a trading signal on its own. The useful questions are how much bad news is already reflected in prices, and what would change the outlook.
Bringing it together
A recession is a shrinking economy, usually measured by GDP and confirmed by jobs and spending data. It shapes interest rate expectations, which in turn ripple through bonds, currencies and shares. Understanding that chain matters more than predicting the exact start date, which even the experts struggle to do.
If you want to understand how you would approach markets when the economic mood turns, our free trader assessment is a sensible next step and shows where your knowledge is strongest and where to build next.
