RealReal Inc. REAL, +0.48% began trading Friday, soaring 45% higher than the $20 IPO price. The company priced above its price range of $17 to $19. The RealReal, a luxury consignment retailer, has gone public as the secondhand retail market grows, with the category expected to reach $51 billion in the coming years. The company uses proprietary technology and trained experts to develop its network of sellers and make available a range of unique, high-end luxury goods. The SPDR S&P Retail ETF XRT, -0.18% has gained 3.6% for the year to date while the S&P 500 index SPX, -0.22% is up 17% for the period.