That's why companies doing HFT or stock exchanges often use microwave links... Just to crank it to eleven err to gain that 30% back.

Information Transmission Between Financial Markets in Chicago and New York: https://arxiv.org/pdf/1302.5966v1.pdf

Time is money when it comes to microwaves: https://www.ft.com/content/2bf37898-b775-11e2-841e-00144feab...

Trading Fortunes Depend on a Mysterious Antenna in an Empty Field: https://www.bloomberg.com/news/articles/2017-05-12/mysteriou...

https://arstechnica.com/information-technology/2016/11/priva...