The hottest fashion item for women on Wall Street? Really expensive pants.

William Edwards/Business Insider

• Wide-leg, high-waist pants are the top trend for women in finance this season.
• Popular brands include Aritzia, Lululemon, Abercrombie, Arcteryx, and Club Monaco.
• Premium fabrics and higher price points define the most sought-after women's business pants.

The hottest fashion item for women in finance right now isn't a flashy accessory like a scarf or a watch, or an expensive pair of shoes. It's a good old pair of pants.

This week...