I suspect this is related to high-speed trading in the stock, bond and futures markets. A number of large financial institutions have noted that there are brief differences in the prices of various financial instruments between the various markets -- for example, NY and Chicago. If they can act fast enough, they can buy in the cheaper market and sell at a profit in the more expensive market before the differences iron themselves out. These institutions have invested a lot in high-speed internet connections between their offices physically near the various markets so they can exploit these differences. Looks like someone is going to try to speed things up by using a SW radio link. Note that the FCC applications were filed with a request for confidential treatment of certain details.
-- Art Delibert, KB3FJO
http://www.hard-core-dx.com/article.php?story=20230520151503169