Jul 26, 2026

Wall Street's $2.7 billion spelling mistake

E.F. Hutton's check-printing error was discovered only when a sharp-eyed recipient called to ask if the windfall was real; the firm spent six weeks po…

Jul 25, 2026

The railroad that accidentally invented junk bonds

Penn Central's collapse left investors holding $82 million in suddenly worthless commercial paper—forcing money market funds to invent an entirely new…

Jul 24, 2026

the invoice that launched a $6 billion empire

Langone's 1981 Home Depot IPO allocated shares to every store employee at the offering price—a radical move that created hundreds of millionaires from…

Jul 23, 2026

The Wall Street fortune built on a single adjective

By calling his brake "universal"—meaning it worked on any railcar configuration—Westinghouse secured not just a device patent but effective control of…

Jul 22, 2026

Three letters that cost investors $440 million

The typist entered earnings of 1¢ per share instead of $1.01—a decimal-point error that triggered automated sell programs across Wall Street, erasing …

Jul 21, 2026

How a rounding error created a $10 billion panic

The DTC discovered the error only after brokers began calling to ask why their clients' portfolios had mysteriously gained shares overnight—some accou…

Jul 20, 2026

The check that sat on a desk for 10 months

The famous $24 figure comes from a single 1846 letter by a town clerk doing rough conversion math—no contemporary Dutch records survive, and modern hi…

Jul 19, 2026

The trading floor that wasn't supposed to exist

The New York Curb Exchange (later AMEX) continued trading outdoors on Broad Street through the Depression while the SEC debated whether to shut it dow…