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Tick… Tick… Tick…
On this day, 155 years ago, the first #stockticker was unveiled. Here's a 🧵on the stock ticker, the device, invented by #EdwardACalahan, that helps stock markets to function efficiently.
#onthisday #inventions @InventorsHOF 1/n
On this day, 155 years ago, the first #stockticker was unveiled. Here's a 🧵on the stock ticker, the device, invented by #EdwardACalahan, that helps stock markets to function efficiently.
#onthisday #inventions @InventorsHOF 1/n
Back in the day, brokers would get to know price movements through pageboys who would run to and fro between the #stockexchange and the offices of brokers. 2/n
Enter Calahan. A school dropout, he was employed as a telegraph operator with #WesternUnion and had a lot of tech-savvy. 3/n
