The Basic Materials sector (XLB) held steady on a trading day that saw S&P 500 drop 0.5%.

Although it went in the opposite direction of the market today, the ETF tracked closer to the overall market today than over the past month. Entering today's trading, XLB was down 1.3% over the last thirty trading days while the S&P 500 was up 0.4%.

MOD-PAC CORP (MPAC) was a major loser in the sector. Its price dropped 10.2% (-54 cents) to close at $4.78, as 38,683 shares moved. The stock traded in a range of $4.77 to $5.30.

Mountain Province Diamonds (MDM) was a significant gainer in the sector, rising 9.4%. The stock closed at $4.42 with 8,509 shares moving. The stock traded in a range of $4 to $4.46. Shares have been on an upward trajectory over the past month, rising 67 cents (17.9%) from a price of $3.75 on June 12, 2012.

KapStone Paper and Packaging (KS) rose 4.8% to close at $16, cross its 50-day moving average of $15.68 and 200-day moving average of $17.34. CVR Partners (UAN) declined 4.5% to close at $23.09, moving below its 50-day moving average of $22.73 and 200-day moving average of $24.92.

Silver Standard Resources (SSRI) rose 3.3% to close at $11.27, approaching its 50-day moving average of $11.75. It has also moved closer to its 200-day moving average of $13.75. Syngenta (SYT) fell 0.9% to close at $64.88, moving down to 0.1% above its 200-day moving average of $64.82.

Universal Forest Products (UFPI) hit a new 52-week high today, reaching $39.84 to top the previous high of $39.69.

Valhi (VHI) hit a new 52-week low today, hitting $10.67 to fall below the previous low of $11.76.