Become your own fashion portfolio manager at CoutureDossier, the high-end trading platform located in Chappaqua. Owner Yulia Omelich brings the Wall Street motto of "buying and selling" to retail. She understands the fundamentals of today's consumer-based economy, and works closely with customers as they sell, shop and swap their luxury clothes and accessories. The shop specializes in Chanel purses and accessories and also features items from other designers, such as Prada and Hermes.