The petition is from the Shortwave Modernization Coalition (SMC), and
the whole docket can be found on the FCC web site ECFS as RM-11953.
They are asking for permission to use various existing Fixed Service
bands between 2 and 25 MHz. Right now, Fixed Services are allowed on the
HF bands for backup purposes, using SSB for voice, which uses 2.7 kHz
channels. There are also some data licensees. SMC is asking for
permission to use up to 50 kHz wide channels, up to 20 kW, and with a
relaxed out-of-channel emission standard that would put very loud junk
onto the amateur bands as well as interfere with other Fixed users,
like, say, competing traders. The Comment and Reply Comment periods have
officially closed, though. It has received a lot of opposition. For one
thing, SMC wanted to be allowed very loose out-of-band emissions because
a more properly filtered transmitter would have a tiny bit more latency,
and flash traders take money from the rest of the market by being just a
smidge faster to execute. There is no public benefit to this, just
private gain for public harm.