High-frequency traders have a few tactics on stock exchanges: but simply put, they gather price information faster than anyone else, sometimes even faster than the markets themselves, and use that to make a tiny profit many, many, many times. There are all sorts of solutions: but it turns out there's a simpler one that involves physics.
Thanks to Ronan and all the team at IEX - you can find out more about them here: https://iextrading.com/ or on Twitter at / iex
I fact-checked Ronan's claim about the SEC white paper because it seemed a bit too good to be true, but he's right: see Hu, E. (2018). Intentional Access Delays, Market Quality, and Price Discovery: Evidence from IEX Becoming an Exchange. SSRN Electronic Journal. https://www.sec.gov/files/07feb18_hu_... [PDF]
Edited by Michelle Martin / @onthecrux
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Watch video How to slow down a stock exchange online without registration, duration hours minute second in high quality. This video was added by user Tom Scott 04 February 2019, don't forget to share it with your friends and acquaintances, it has been viewed on our site 3,614,51 once and liked it 85 thousand people.