Why Good Coins Disappear

In 1965 a congressman from Massachusetts stood up in the House of Representatives and picked a fight with a man who had been dead for 386 years. Silvio Conte accused Sir Thomas Gresham of making illicit profits when London’s Royal Exchange was founded. Then he conceded that the dead man was going to win anyway. Gresham’s law, Conte admitted, would drive America’s silver coins out of circulation.

Gresham’s law says bad money drives out good, where the law forces both to be accepted at the same value. Hand people two coins the law calls equal, one of them worth more as metal, and they spend the cheap one and keep the good one, until the cheap one is all that’s left on the counter. Congress heard the prediction and passed the Act anyway, like a parent who warns that the cookies will vanish if they’re left out on the counter, leaves them on the counter anyway, and then acts shocked at the crumbs. Within a few years the silver had left the cash registers.

A lot of it is still sitting, sixty years later, in coffee cans and sock drawers in American basements. It was put there by people who couldn’t have told you who Gresham was, and who obeyed him to the letter.

What is Gresham’s law, in plain English?

Everybody remembers the slogan, “bad money drives out good.” Almost nobody remembers the fine print, which is too bad, because the fine print is the law. In a free market a better coin just costs more, the way a ripe peach costs more than a bruised one, and nobody names a law after the peach. Things get weird the moment a law says the cheap coin and the valuable coin must be treated as exactly equal.

So picture two coins in your palm, legally identical and physically nothing alike. Which one do you hand the cashier?

You spend the bad one. Obviously you spend the bad one. It costs you less to part with, and the good one is worth more sitting in a drawer. Everybody else makes the same call at their own kitchen table, and before long every coin still changing hands is a bad one.

Think of the office fridge. Nobody holds a meeting about the office fridge. The good yogurt just goes home in a tote bag, one tote bag at a time, and by Thursday the shelves hold a jar of mustard of unknown ownership and a single shriveled lemon.

Management sends an all-staff email with the subject line FRIDGE ETIQUETTE. By Friday it has 40 replies, the good yogurt is still gone, and someone has taken the magnet. Nobody stole anything. Everybody took home what was worth taking home. In 1965, America’s pockets became that shelf.

Why did silver coins disappear in 1965?

Picture 1964. The country is running out of change. The Federal Reserve is rationing coins, stores are begging customers to break open their piggy banks, and the coins collected by newsboys, vending-machine operators and church collection plates have become the hottest property in town. One Fed official reports that he hasn’t seen a bank deposit a half dollar in eight months. Officials suggest the culprits might be coin collectors, which is a little like blaming a drought on people who own buckets.

Into this mess, in March 1964, the Mint releases 26 million brand-new Kennedy half dollars, a few months after the president’s death. They are hoarded almost at once, as keepsakes and as investments. Grief and Gresham, it turned out, pointed in the same direction.

That year the Mint turned a record 202.5 million ounces of silver into coins, and about a third of it became coins that never circulated. That third was about 67 million ounces, worth roughly $3.6 billion at the October 24, 2026 price. It went straight from the Mint into sock drawers, like a sports car that only leaves the garage for oil changes.

The deeper problem was silver itself. The Treasury was selling its silver at about $1.29 an ounce to hold the price down, while industry and the Mint kept wanting more. Picture a store selling twenty-dollar bills for nineteen and acting surprised by the line around the block. Anyone could see where that road ended: silver would rise, and the metal in a quarter would be worth more than a quarter.

So on July 23, 1965, the Coinage Act took the silver out. Until then, dimes and quarters had been 90 percent silver. From then on they were copper-nickel clad: a slab of copper pressed between two thin skins of copper-nickel. The half dollar dropped to 40 percent. In 1970 it lost the rest.

The official case for the change, made in the President’s message to Congress that June, was that silver needed by industry shouldn’t be wasted as a means of exchange. So the government’s own sales pitch for the new coins was that silver had become too valuable to spend. The public agreed completely, and went home to find a coffee can.

During the debate, Harold Gross of Iowa asked why, if the country was going to debase its coinage, it didn’t just go back to wampum. Congress chose copper-nickel instead. Wampum had one fatal flaw, which was that it would have jammed the vending machines.

And the vending machines mattered. The clad metal’s electrical properties were similar to silver’s, so it would work in the machines already out there without anybody having to adjust them. The new coin was engineered to convince a soda machine that it was silver, and the soda machine was convinced. People were a tougher audience.

The new coins soon picked up a mocking nickname built on the word “sandwich,” for their copper filling. You can still see that filling today: it’s the reddish stripe around the edge of any quarter in your pocket. A silver sandwich, hold the silver.

The law said old and new were the same. A 1964 quarter and a 1965 quarter were both worth twenty-five cents, and both had to be accepted as such. Physically, one held about 0.18 troy ounces of silver. The other held none.

Meet Walt. Walt is not a real person. He is an illustrative composite of everyone who carried a pocketful of change in 1965, and we made him up so the story would have somewhere to sit. Walt drives a Rambler, takes his coffee black and keeps a transistor radio on the windowsill. One evening he empties his pockets onto the yellow Formica of the kitchen table and finds a 1964 quarter and a 1965 quarter. A man at work has told him the old silver coins ring differently when you drop them, so he drops them.

One goes ting.

The other goes tunk.

Walt looks at the two coins. The law says they’re the same. His ears disagree. The tunk goes back in his pocket for the parking meter. The ting goes into an empty coffee can on a high shelf, a decision Walt mentions to no one, because said out loud it would sound ridiculous. Across the country, millions of Walts make the same ridiculous decision, and the coffee cans of America start putting on weight.

Walt, as it turns out, was early. For two more years the Treasury kept selling silver at that $1.29 price, which kept the metal in a silver quarter worth a hair less than the quarter. Then, in July 1967, it stopped holding the price down, announcing that it had enough new coins to keep the country supplied even if every remaining silver coin vanished from circulation. Silver rose. The coins took the hint. Gresham’s law needs one gap to switch on: the good coin has to be worth more as metal than the number stamped on it.

Into the weeds: the exact price where a silver quarter becomes worth more than a quarter

The Treasury’s official figure was $1.2929 an ounce, and it wasn’t picked at random. It’s the price at which the 0.7734 troy ounces of silver in an old silver dollar is worth exactly one dollar. Dimes, quarters and half dollars carried a little less silver per dollar of face value, so their metal didn’t pass face value until silver reached about $1.38 (a quarter’s roughly 0.1808 ounces, divided into 25 cents).

Once the Treasury stopped defending $1.2929, the market sailed past both numbers. By June 1968 silver was $2.56 an ounce, and a silver quarter held roughly 46 cents of metal.

Is it illegal to melt silver coins?

Not anymore, but it was. Washington saw the hoarding coming and fought it with everything in the junk drawer.

Step one: blame the coin collectors. Officials had already done that.

Step two: take away the thing collectors collect. The Act dropped mint marks, the tiny letter that tells a collector which Mint struck a coin, for up to five years.

Step three: stop the calendar. Congress let the Mint keep striking 1964-dated silver coins into 1965, hoping to make so many that nobody would bother putting them aside, and the Mint kept stamping 1964 on silver until 1966. For two years, as far as America’s silver was concerned, it was always 1964.

Step four: the big stick. The Act let the Treasury Secretary prohibit melting or exporting coins, with penalties of up to five years in prison, and in 1967 the Treasury used it. So Congress wrote a law, and then wrote a law against what the law would cause. Picture a dad who switches the house to store-brand cereal, then grounds anyone caught hiding the last box of the good stuff.

There was no step five. Nobody ever thought to outlaw the ting.

The bans were lifted in March 1969, and melting a silver quarter has been legal ever since. Its humbler cousins weren’t so lucky. By 2006, metal prices had pushed the cost of making pennies and nickels well above their face value, so in December 2006 the US Mint banned melting them, “to safeguard against a potential shortage of these coins in circulation.” The penalty, once again, was up to five years in prison. Gresham’s law has now been outlawed twice in the United States, both times by people who believed in it.

Meanwhile that 1964 quarter is still worth twenty-five cents in the eyes of the law. Inside, it contains about $9.77 of silver at silver’s price on October 24, 2026. Feed it to a parking meter and you’ve paid nearly ten dollars for a quarter’s worth of parking. Grandpa always said they don’t make them like they used to. He meant cars. He was also right about quarters. You can check any denomination and any year if you want to know what’s actually in the jar.

Now scale it up to the roll of quarters you keep for the laundromat. Forty 1964 quarters hold about 7.2 ounces of silver. Feed the roll into a laundromat dryer and your towels come out warm and fluffy, and you come out about $390 poorer.

Who was Gresham, and did he really discover it?

So who was the dead man Conte was arguing with? Sir Thomas Gresham was a Tudor financier who advised the Crown on its coins, which Henry VIII had thoroughly wrecked (debasing a coin is an old royal habit; Rome perfected it). In 1558 Gresham warned the new Queen Elizabeth that “all your fine gold was convayed out of this your realm.” That’s Gresham’s law, reported live by a man watching it happen. But he didn’t originate the idea, and he never called it a law.

Nicolaus Copernicus set it out in 1519, in between rearranging the solar system, and Nicole Oresme got there around 1350. A Victorian economist, Henry Dunning Macleod, pinned Gresham’s name on it in 1857 and 1858, and it stuck. It is the oldest group-project story there is: two people do the work, and the credit goes to the name somebody remembered during the presentation.

The playwright Aristophanes beat all of them, around 405 BC. In The Frogs he compared Athens’s debased coins to its inferior politicians: the good, old, honest ones get ignored while the cheap, new, bad ones get all the circulation. Twenty-four centuries later it still works in any school gym: the kid with the sensible plan loses class president to the kid who promised pizza Fridays.

Where does Gresham’s law still show up?

Anywhere a government sets an official exchange rate that’s different from the real one. When a busy black market springs up next to the official rate, people spend the overvalued local currency and keep the dollars in the mattress. Every black-market exchange rate on earth is the office fridge again, with a flag on the door. The good yogurt is US dollars, it goes home in mattresses, and the all-staff email is signed by the central bank.

It can’t happen inside your bank account. There’s no good dollar and bad dollar on a screen, because every one of them is the same number. Gresham needs two things you can weigh in your hand and a rule insisting they’re the same.

What does Gresham’s law teach us about sound money?

Look at what happened in 1965 with nobody’s help. No one ran a campaign or explained sound money to the American public. Tens of millions of ordinary people, who couldn’t have defined fiat currency and had never heard of Gresham, picked up two coins the law said were identical, heard the difference, and put the heavier one in a can.

Their ears were right. Sixty years on, that quarter’s silver is worth about forty times the coin’s face value. The clad quarter is still worth exactly twenty-five cents, and those cents buy a little less every year.

The fair objection, stated once: those coffee cans were dead money for decades, earning nothing, while people who spent their silver and invested the proceeds often did better. Gresham’s law says nothing whatsoever about timing.

But look at what the can never needed. No bank had to stay open. No company had to keep paying. No government had to leave the quarter the way it was, which was lucky, because in 1965 it had just changed it. The silver in the can never depended on anyone keeping a promise. It only had to stay silver, and that is the one job silver has never failed to do.

Sir Thomas Gresham has been dead since 1579, and he is still winning the argument. A vending machine still can’t tell a 1964 quarter from this year’s, because in 1965 the new coin was designed so it couldn’t. For a second opinion, do what Walt did: drop the old one on the kitchen table next to this year’s, and listen.

Ting.

Sources

• The Coinage Act of 1965 (signed July 23, 1965; dimes and quarters to clad, half dollar to 40% silver; Representative Conte conceding Gresham’s law; the melting and export provision; the 1964 Kennedy half dollar hoarding): Coinage Act of 1965, Wikipedia (a secondary source that cites the Congressional Record).
• Who named Gresham’s law and when (Macleod, 1857–58), earlier observers (Aristophanes, Oresme, Copernicus), and the legal-tender condition: Gresham’s law, Wikipedia (a secondary source).
• A 1964 US quarter holds about 0.1808 troy ounces of silver. The $9.77 figure uses silver at $54.05 an ounce, indicative spot from gold-api.com on October 24, 2026, and the “thirty-nine times” comparison is our own arithmetic ($9.77 against 25 cents). So are the 67 million ounces and $3.6 billion (a third of 1964’s 202.5 million ounces at $54.05) and the $390 roll (40 quarters at 0.1808 ounces). “Walt” is an invented composite, not a documented person.

Questions people actually ask

What is Gresham's law?

Gresham's law says that bad money drives out good money when the law requires both to be accepted at the same value. People spend the cheaper money and hoard the better money, so the better money disappears from circulation. It needs a legal rule that treats unequal money as equal.

Who was Gresham, and did he invent Gresham's law?

Sir Thomas Gresham was a sixteenth-century English financier who advised the Crown on coinage. He did not invent the idea. Copernicus described it in 1519 and Oresme around 1350, and Henry Dunning Macleod named it after Gresham in 1857 to 1858.

Why did silver coins disappear in 1965?

The Coinage Act of 1965, signed July 23, 1965, replaced the silver in dimes and quarters with copper-nickel clad. Old silver and new clad coins were legally equal, so people spent the clad coins and kept the silver ones, and silver coins soon vanished from circulation.

What was the Coinage Act of 1965?

It removed silver from US dimes and quarters, replacing it with a copper-nickel clad, and cut the half dollar from 90% to 40% silver. Silver was removed from the half dollar entirely in 1970. Congress also authorized limits on melting and exporting coins.

How much silver is in a 1964 quarter?

A 1964 US quarter is 90% silver and holds about 0.1808 troy ounces of pure silver. At silver's October 24, 2026 price of $54.05 an ounce, the metal is worth about $9.77, many times the quarter's 25-cent face value.

Is Gresham's law still true today?

It applies wherever law forces unequal money to be treated as equal. Today the clearest cases are countries with a fixed official exchange rate and a parallel market, where people spend the overvalued currency and save the hard one. It does not operate between two bank balances, which are the same.

What is an example of Gresham's law?

The 1965 US coin change is the classic modern example. Silver and clad quarters were legally equal at 25 cents, so people spent the clad ones and kept the silver ones. A medieval example is a king diluting a coin while forcing it to circulate at its old value.

Does Gresham's law mean I should keep old silver coins?

No. Gresham's law describes what people did, not what anyone should do. Silver coins pay no interest, cost money to store, and can fall in price, and many people who spent their silver and invested the proceeds did better. It is not investment advice.

Which US coins are made of silver?

US dimes, quarters and half dollars dated 1964 or earlier are 90% silver. Half dollars from 1965 to 1970 are 40% silver. Dimes and quarters from 1965 onward are copper-nickel clad with no silver. You can check what any year's coin is worth in silver with our calculator.

Why did the government make it illegal to melt coins in 1965?

Because Congress expected people to hoard and melt the old silver coins once they were worth more as metal than as money. The Coinage Act of 1965 let the Treasury Secretary prohibit melting or exporting coins, with penalties of up to five years in prison. It was Gresham's law, anticipated in the statute itself.

What is the opposite of Gresham's law?

When people are free to value two currencies differently, the good one tends to win instead: sellers demand it and buyers pay a premium for it. This reverse effect is sometimes called Thiers' law. Gresham's law only operates when a rule forces unequal money to be accepted at the same value.

Is it illegal to melt silver coins?

No. The melting and export bans that came with the Coinage Act of 1965 were lifted in March 1969, so melting a silver dime, quarter or half dollar is legal. Pennies and nickels are different: the US Mint banned melting them in December 2006, with penalties of up to five years in prison, and that rule is still in force.