On a trading day that saw the S&P 500 gain 1.4%, the Basic Materials sector (XLB) showed little change.

The ETF, as a proxy for the sector, tracked farther from the overall market today than over the past month. As trading began today, XLB was down 1.6% over the last thirty trading days while the S&P 500 climbed -1.7%.

Rockwood Holdings (ROC) was a major gainer in the sector, rising 10.3% (+$5.05) to close at $53.90 with 2.2 million shares moving. The stock traded in a range of $51 to $54.48. Share price is up, having risen $1.44 (2.7%) from $52.46 on March 26, 2012. Allegheny Technologies Incorporated (ATI) also gained today, climbing $2.46 (+6.1%) to close at $42.79.

Shiner International (BEST) was one of the sector's big losers, as its price dropped 9.8% (-4 cents) to close at 37 cents. 11,294 shares of the stock moved. The stock traded in a range of 36 cents to 40 cents.

Fibria Celulose (FBR) fell 5.8% to close at $7.94, crossing its 50-day moving average of $8.41. Meanwhile, Schweitzer-Mauduit International (SWM) climbed 2.6% to close at $67.90, moving past its 200-day moving average of $67.47.

Potash Corp./Saskatchewan (POT) rose 4.2% to close at $44.28, approaching its 50-day moving average of $44.51. It has also moved closer to its 200-day moving average of $45.49. TPC Group (CGA) fell 2.7% to close at $44, moving closer to its 50-day moving average of $42.83. Also, the stock moved closer to its 200-day moving average of $4.12.

FMC Corporation (FMC) hit a new 52-week high today, reaching $108.86 to top the previous high of $108.39.

Ivanhoe Mines (IVN) hit a new 52-week low today, hitting $11.25 to fall below the previous low of $11.68.