Forgive the AMP link but Bloomberg has a paywall of sorts now. https://www.google.com.au/amp/s/www.bloomberg.com/amp/opinion/articles/2019-03-11/you-need-a-big

Forgive the AMP link but Bloomberg has a paywall of sorts now. https://www.google.com.au/amp/s/www.bloomberg.com/amp/opinion/articles/2019-03-11/you-need-a-big-tower-to-trade-stocks https://www.google.com.au/amp/s/www.bloomberg.com/amp/opinio... > And while Scientel clearly has high-frequency trading in mind—“the name that keeps coming up among industry sources is Citadel”—that’s not all it has in mind. It’s a tower that can send signals for lots of stuff. “Scientel has said it will equip its Aurora tower with 28 antennas—24 for public safety and municipal use and four for ‘private’ purposes.” People often complain that high-frequency trading encourages a socially wasteful arms race, and you certainly see some of that here, as lots of trading firms compete to put their antennas as close as possible to the CME servers. But another way to interpret this story is that high-frequency trading is subsidizing high-tech communications infrastructure for everyone else, building towers to send high-speed signals for public safety and municipal use just to justify a couple of high-frequency trading antennas.