StockX, an online exchange that offers buyers and sellers historical price and volume metrics, real-time bids and offers, time-stamped trades, individualized portfolio tracking and metrics, as well as in-depth market analysis and news on sneakers (yes, the shoes kind), just announced an investment from Eminem (otherwise known as Marshall Mathers), and his manager Paul Rosenberg. 

StockX, which launched in February of 2016, was co-founded by Josh Luber, who serves as the company’s CEO, and Dan Gilbert, founder and chairman of Quicken Loans and majority owner of the Cleveland Cavaliers.  Recently, StockX closed an investment round that included Silicon Valley investor Ron Conway and his SV Angel fund, and Detroit Venture Partners.

StockX says it plans to expand to additional consumer product segments that have a natural need for a live secondary market.