Is Inflation a Blessing or a Curse?

What Is Inflation?

The textbook definition is straightforward enough: inflation is the rate at which the general level of prices for goods and services rises over time, which erodes the purchasing power of money. If inflation runs at 5%, something that costs $100 today will cost roughly $105 a year from now.

In practice, no two things inflate at the same rate, which is why economists lean on a blended measure like the Consumer Price Index (CPI), a running tally of what a representative basket of everyday goods and services actually costs consumers over time.

But the more useful way to hold this idea in your head isn't "prices go up." It's "cash goes down." Nothing about a loaf of bread changes when inflation rises. What changes is how much your money can still buy of it. Once you start thinking about inflation as a slow leak in the value of cash, rather than a slow climb in the cost of things, everything that follows starts making a different kind of sense.

The Winners and Losers of Inflation

The winners and losers of inflation aren't random: anyone holding debt at a fixed rate wins, because they repay it in cash worth less than when they borrowed it, while anyone holding cash loses as its buying power quietly erodes.

Alan Greenspan (born March 6, 1926) ran the US Federal Reserve from 1987 to 2006, and for most of that time, Fed policymakers privately agreed on a target: keep inflation at around 2% a year. They didn't say so publicly, at Greenspan's own insistence. Two percent was treated less as an announcement than a quiet operating assumption, low enough to avoid the risk of deflation, stable enough that nobody had to think about it too hard.

Governments lean on interest rates to keep inflation near that number. Raise rates, and saving gets more attractive while spending gets more expensive, which cools demand and, in theory, prices along with it.  

The conventional wisdom is that a little inflation, low, stable, predictable, is actually a sign of a healthy economy, because it means the value of your investments and assets is quietly rising while the real value of what you owe is quietly falling.

Notice the two conditions buried in that sentence: investments, and what you owe. That policy only flatters you if you're holding assets and holding debt. If you're sitting mostly in cash, with no mortgage and no loan attached to anything, the exact same 2% that's making the property-owning, mortgage-holding household better off every year is taking a small, silent bite out of you instead. Same policy. Same number. Two completely different experiences, depending entirely on which side of the ledger you happen to be standing on.

What Do the Numbers Show About Inflation?

Here's where it stops being theoretical. Say you borrow $100,000 from a bank at a fixed 5% over 25 years to buy a house. At the point of purchase you earn $36,000 a year, and your repayments run $585 a month. To see what inflation actually does to that arrangement, apply the same rate of inflation to both the value of the house and to your wage, and watch what happens to everyone in the deal, not just you.

3% Inflation for 7 years

At 3%, this is close to the textbook version of the miracle of compounding. Over seven years your house has risen in value by about 20%, your wages have risen by roughly the same amount, and your repayment hasn't moved at all. You are, in real terms, meaningfully ahead.

Look at it from the lender's side and the picture holds up too. They're earning 5% on money that's only losing 3% of its value a year, a real return of about 2%. Nobody in this transaction is losing. The borrower gets richer in real terms, the lender still comes out ahead of inflation, and the arrangement holds together because both sides are quietly winning, just at different rates. This is the version of inflation everyone is happy to talk about.

20% Inflation for 7 years

Now push the same mechanism further. At 20%, over the same seven years, your house has roughly tripled in value and so have your wages, while your repayment is still exactly $585 a month, a number that would have sounded serious in year one and sounds almost like a rounding error by year seven.

From where you're standing, this looks like the best deal in financial history. From the lender's side, it's a disaster: they're earning 5% on money that's losing 20% of its value a year, a real loss of about 15% annually. And lenders notice arithmetic like that just as quickly as borrowers do. They stop lending, or they demand rates nowhere near 5% before they'll try again, which means the next person who wants to buy a house, quite possibly you, a few years from now, can no longer get the deal you just got. The 20% world doesn't just cost the lender money. It quietly closes the door behind you.

It's only a win if everyone involved is winning, even if they're winning by different amounts. The moment one side of that trade starts losing badly enough, the trade stops happening for anyone.

For a longer view of the same mechanism, twenty years of inflation, interest rates and the share market side by side, see what happens to your money when the cost of living rises.

Zimbabwe and the Anatomy of Hyperinflation

Hyperinflation is what economists call inflation running at more than roughly 50% in a single month, the point where money stops doing its job and people rush to spend it before it loses more value. Zimbabwe in the 2000s is the textbook case.

On the 18th of April 1980, Rhodesia became Zimbabwe. Two decades later, a set of policy decisions known as the Economic Structural Adjustment Programme (ESAP) drove food production down by roughly 45%, pushed unemployment up by around 80%, and shortened life expectancy across the population. Demand for food, goods, and basic services badly outstripped supply, and with a government unwilling or unable to change course, the result wasn't high inflation. It was hyperinflation, the same mechanism from the numbers above, except with every brake removed.

That's the note from the opening of this article: a hundred trillion dollars, handed over for two coconuts. It isn't a punchline. It's what the 20% scenario looks like once it stops being a worked example and starts being an entire country's actual currency.

How to Beat Inflation: Make It Work for You

You can't personally set the inflation rate, but you can decide which side of it you're standing on, and that decision is almost entirely within your control.

• Own things that tend to rise with inflation. Gold and real estate have historically held up well over long stretches. That said, don't overestimate your own skill at picking investments, the boring, slow, unglamorous option is often the safer one, and every investment carries some cost to hold, so know what that cost is before you commit to it.
  
• Don't sit on more cash than you need. Cash is the one asset inflation is guaranteed to erode, so hold enough to stay comfortable and no more. At the same time, remember that governments often raise interest rates to fight inflation, so make sure you could handle higher repayments if they do, either by keeping a cash buffer on hand or by fixing your rate in advance. Just be careful not to fix a rate you couldn't actually afford if it moved.
  
• Manage your money well enough to still enjoy it. None of this is really about hoarding against some imagined future. Life is for living, and the point of positioning yourself sensibly against inflation is to be able to afford both the investments and the life, not to trade one for the other.
  

Inflation itself doesn't reward or punish anyone directly. It just quietly amplifies whatever position you were already in when it arrived, and almost nobody ends up well positioned by accident.