Initial public offerings revved up in June after a slow start to the year. The ETFs holding these shiny new stocks are beating the broad market year to date. The average first-day IPO pop is 15% this year, up from 13% in 2014 — a blockbuster year for IPOs, according to Renaissance Capital, manager of Renaissance IPO (IPO). This exchange traded fund is up 4.7% year to date. By comparison, SDPR S&P 500 (SPY) has gained 0.2%.