Claim Ponzi invented paying old investors with new money.
Timeline beat 1903 — Arrival in the United States
The pattern is older. The 1920 Boston collapse is the English namesake, not the first instance.
Darker cells mean a higher score for this topic on that metric.
Notoriety90
Mystery20
Scale55
Evidence70
Legal impact75
Culture92
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Quick answers
What did Charles Ponzi claim to be doing?
He told investors that profits would come from buying and redeeming International Reply Coupons across borders. Investigators in 1920 showed that coupon issuance could not support the money he was taking.
When did the scheme collapse?
Public unraveling came in July-August 1920 as the Boston Post published its investigation and investors sought redemptions. Ponzi surrendered to authorities in August 1920.
What was he convicted of?
He pleaded guilty to federal mail fraud in 1920. Massachusetts later convicted him of larceny after a 1922 mistrial and a 1925 guilty verdict. He served federal then state time.
How much money was involved?
Contemporary estimates commonly cite about $15-20 million in 1920 dollars of liabilities or take, with tens of thousands of note-holders. The figure is not comparable, unadjusted, to late-twentieth-century cases.
Did the Boston Post really break the case?
The Post's July-August 1920 reporting, using Barron and postal facts, is the investigation the Pulitzer board later honored. State and federal officers were already looking; the newspaper made the arithmetic public.
Was this the first such fraud?
No. Earlier promoters had paid old investors with new money. The 1920 Boston collapse is the namesake event in English, not the first instance in history.
The case year is 1920. The biography around it explains how a local collapse became a legal noun.
These entries follow court dates and the Post's published chronology.
Timeline
JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
- Arrival in the United States
Carlo Pietro Giovanni Guglielmo Tebaldo Ponzi lands in the U.S. after leaving Italy. Later records note early theft and forgery troubles in Canada and the U.S.
- Securities Exchange Company
Ponzi organizes the Boston note business that will advertise coupon profits and 45-day returns.
- Boom months
Early and mid-1920 see rapid inflows. Agents recruit. The office becomes a Boston spectacle.
- Boston Post investigation
In July and August the Post publishes articles showing the coupon market cannot support the books. Barron supplies finance-press arithmetic.
- Surrender
In August Ponzi surrenders to federal and state authorities as redemptions and the press close the business.
- Federal mail-fraud plea
In November he pleads guilty to federal mail fraud and is sentenced to five years.
- State mistrial
A Massachusetts larceny trial ends without a verdict. Prosecutors retry the case.
- State conviction
A Massachusetts jury convicts Ponzi of larceny. He later serves state time after the federal sentence.
- Deportation
After release from state custody, immigration authorities deport him. He does not return to a U.S. career.
- Death in Rio
Ponzi dies on 18 January 1949 in Rio de Janeiro. By then U.S. enforcement already used his name as a category.
Claim versus timeline
Each public-record claim on this dossier sits beside the timeline chapter already on the page.
Public-record encyclopedia. Not legal advice, not a how-to, not a private file.
Claim Warehouses of reply coupons would have made the returns real.
Timeline beat 1919 — Securities Exchange Company
1920 reporting showed global coupon issuance was far too small. The instrument was real; the scaled investment engine was not.
Claim He was never convicted in court.
Timeline beat 1920 — Boom months
He pleaded guilty to federal mail fraud in 1920 and was convicted of Massachusetts larceny in 1925.
Claim The losses rivaled modern billion-dollar cases in 1920 cash.
Timeline beat 1920 — Boston Post investigation
Period figures are about $15-20 million then. Later cases are larger in nominal dollars; comparisons need inflation and market-size context.
Beat weight marks
Mark each timeline beat already on this dossier as supported, contested or unknown, using the public-record claims already filed here. Not a verdict.
Editorial marks on this device only. Public-record encyclopedia — not legal advice, not a how-to, not a private file.
| Timeline beat | Supported / Contested / Unknown |
|---|---|
| 1903 — Arrival in the United States Claim already on file: Ponzi invented paying old investors with new money. | |
| 1919 — Securities Exchange Company Claim already on file: Warehouses of reply coupons would have made the returns real. | |
| 1920 — Boom months Claim already on file: He was never convicted in court. | |
| 1920 — Boston Post investigation Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1920 — Surrender Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1920 — Federal mail-fraud plea Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1922 — State mistrial Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1925 — State conviction Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1934 — Deportation Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. | |
| 1949 — Death in Rio Claim already on file: The losses rivaled modern billion-dollar cases in 1920 cash. |
After 1925 the live U.S. file is custody and deportation; the naming of the scheme was already underway in the press.
Public-record encyclopedia. Not legal advice. Not a how-to. Graphic detail is withheld. Wars belong in a separate atlas.