An interesting contrast to several books I've read about Wall Street traders. This focuses on Chicago commodities traders, mainly at the Chicago Mercantile Exchange ("the Merc") and also at the Chicago Board of Trade. The book talks mainly about the culture, which sounds even worse than Wall Street.
She describes in vivid detail how the Merc is filthy, how the traders there break all the rules (no spitting, no littering, no threatening other traders), but the rules are strictly enforced against any women on the floor (no open-toed shoes, your skirt's too short, etc.). She also describes how trading gets people hooked on the money even while it makes them miserable, and it warps their view of the world (asking women to take off their shirts for thousands of dollars).
On the bright side, one woman trader at the CBOT managed to enforce some level of civility in her trading pit (wheat futures). Cari Lynn is a capable writer but no Michael Lewis, so there's no deeper analysis here, just a description of the scum on the surface.