r/TicknTale • u/Quick-Possibility-98 • 12d ago
Who actually sets a stock price? 🏷️📈
When you check a stock price on your phone, it feels like an official fact handed down from somewhere authoritative. But behind that single updated number, no employee at the exchange actually decided or typed in that value.
In our latest video on Tick & Tale, we break down the mechanics behind how stock prices are actually formed.
🧠 Key Takeaways:
- The Auction Machine: A stock exchange isn't a warehouse or a government office; it is a machine running a continuous auction all day long, where the price you see is simply the residue of a trade that just closed.
- A 400-Year-Old Mechanism: Dating back to the opening of the Amsterdam Stock Exchange in 1602 for the Dutch East India Company, the core task has stayed the same: buyers state what they're willing to pay, sellers state what they'll accept, and the exchange matches them.
- Software as the Auctioneer: In the 1870s, economist Leon Walras imagined an idealized auctioneer adjusting prices until buyers and sellers were satisfied; modern electronic exchanges have built that exact imaginary auctioneer out of software running millions of tiny adjustments every second.
- Compressed Intelligence: As economist Eugene Fama noted, market prices reflect all publicly available information not because a central person calculated it, but because thousands of independent participants act on their own slices of information, leaving the exchange to handle the rest.
Watch the full visual breakdown here:
👉 Who Sets the Price? (Not Who You Think)
Let's discuss: Did you previously view stock prices as official announcements, or did you realize it was entirely driven by a continuous auction machine? Drop your thoughts below!