The semiconductor sector was enjoying a broad and healthy rally in afternoon trading Monday, enough to propel the PHLX Semiconductor Index          SOX,         -1.17%        into record territory. The chip sector index, known as the “SOX,” ran up 2.7% with all 30 components gaining ground. The SOX has now run up 8.2% amid a four-session win streak, and was on track to close above the Dec. 7 record of 3,988.75. Advanced Micro Devices Inc.’s stock          AMD,         -1.54%        was the SOX’s biggest gainer, rallying 5.9%, but was still below its Nov. 29 record close of $161.91. The SOX’s other top performers Monday were Lattice Semiconductor Corp. shares,          LSCC,         -1.94%        which climbed 4.9%, and Nvidia Corp.’s stock,          NVDA,         -2.33%        which hiked up 4.7%. Among other more-active SOX components, shares of Intel Corp.          INTC,         -0.34%        were up 1.1% and Micron Technology Inc.’s stock         MU,         -1.80%,        which was the SOX’s worst performer on Monday, rose just 0.4%. The SOX’s unanimous rally Monday comes as the technology-heavy Nasdaq 100          NDX,         -0.28%        jumped 1.4% and the S&P 500          SPX,         +0.06%        rose 1.2%.