) ... Gainers outnumbered decliners 319 to 184 within the S&P 500. Crown Castle (CCI) gained 15.6% to lead the day, while T-Mobile US (TMUS) fell 13.3%, the weakest showing ... ReturnsYTD ... 1 CCI Crown Castle 15.6% -6.9% ... 2 CCI Crown Castle 19.9% -6.9%.