She persisted—and it paid off. Chelsea Clinton, the daughter of former President Bill Clinton and former Secretary of State Hillary Clinton, joined the board of IAC/InterActiveCorp ,the owner of a portfolio of internet brands, in September 2011. Her personal stake in IAC has swelled to more than $6.6 million as the stock has more than tripled in value in the past two years. Since she joined the board of IAC (ticker: IAC), Clinton, the vice chair of the Clinton Foundation, has never purchased any IAC shares on the open market, according to regulatory filings with the Securities and Exchange Commission....