The availability of point spreads for the past three WNBA seasons offers researchers an early opportunity to test the efficiency of the market for wagers on WNBA games. While the more mature betting markets for football, baseball and men's basketball have generally denied regular profits to participants, the unique and emerging nature of the WNBA would seem to warrant another look at the vulnerability of betting lines. By examining the efficiency of WNBA point spreads, this study is, to a large extent, testing the hypothesis that markets in the emerging stage lack the participation that ensures efficient pricing and thus become potentially vulnerable to regular profit-taking.