NEW YORK--(BUSINESS WIRE)---- $MKTX--MarketAxess Holdings Inc. (Nasdaq: MKTX), the operator of a leading electronic trading platform for fixed income securities, today announced the upcoming launch of Opening and Closing Auctions—the first standardized market-wide auction protocol designed to improve price discovery and provide access to unique liquidity for trading U.S. credit. In developing the new Opening & Closing Auctions, MarketAxess consulted a diverse group of buy-side and sell-side participa. ...