Shares of MarketAxess Holdings Inc. (MKTX) have gained 17.2% in the past six months compared with the industry’s 11.3% growth. The Finance sector and the S&P 500 composite index rose 10.8% and 9.5%, respectively, in the same time frame. With a market capitalization of $9.7 billion, the average volume of shares traded in the past three months was 0.4 million.MarketAxess benefits from increased trading volumes, market share gains across a diversified set of product categories, strategic partnerships and a str ...