On a trading day that saw the S&P 500 gain 0.7%, the Transportation sector (IYT) showed little change.

While being down today, the ETF, as a proxy for sector performance, tracked closer to the overall market today than over the past month. Entering today's trading, IYT was up 0.3% over the last thirty trading days while the S&P 500 was down 3.4%.

Knightsbridge Tankers (VLCCF) was a major loser in the sector. Its price dropped 9% (-70 cents) to close at $7.05, as 820,652 shares moved. The stock traded in a range of $7.03 to $7.64. The stock is down over the last three months, having fallen $3.17 (-31%) from $10.22 on May 21, 2012.

Increasing 3.7% (+67 cents) to close at $18.69, Marten Transport (MRTN) was a major gainer in the sector. Today, 63,500 shares traded hands. The stock traded in a range of $18.05 to $18.70. The stock has been dropping in the last two months, down $3.56 (-16%) from a price of $22.25 on June 19, 2012.

The Greenbrier Companies (GBX) rose 1.7% to close at $15.71, cross its 50-day moving average of $15.48 and 200-day moving average of $17.75. Teekay Tankers (TNK) declined 3.4% to close at $4.26, moving below its 50-day moving average of $4.13 and 200-day moving average of $4.46.

FreightCar America (RAIL) rose 1.5% to close at $19.54, approaching its 50-day moving average of $20.44. It has also moved closer to its 200-day moving average of $21.63. Grupo Aeroportuario del Sureste (NM) fell 4.4% to close at $85.56, moving closer to its 50-day moving average of $83.64. Also, the stock moved closer to its 200-day moving average of $3.61.

Canadian Pacific Railway (CP) hit a new 52-week high today, reaching $86.10 to top the previous high of $85.24.