The Transportation sector (IYT) held steady during a trading day that saw the S&P 500 grow 0.3%.

As a proxy for the sector, the ETF tracked closer to the overall market today than over the past month. As trading began today, IYT was down 1.3% over the last thirty trading days, and the S&P 500 climbed 1.5%.

Diana Containerships (DCIX) was a major loser in the sector. Its price dropped 14.6% (-$1.05) to close at $6.15, as 4.6 million shares moved. The stock traded between $6.10 and $6.25. The stock has been going in a negative direction over the last month, dropping $1.40 (-18.5%) from a price of $7.55 on June 19, 2012.

Grupo Aeroportuario del Sureste (ASR) was a significant gainer in the sector, rising 7.8%. The stock closed at $85.70 with 245,092 shares moving. The stock traded in a range of $79.89 to $86.01. The stock has been on an upward trajectory over the last two months, rising $14.46 (20.3%) from a price of $71.24 on May 21, 2012.

Mobile Mini (MINI) fell 2.5% to close at $13.93, crossing its 50-day moving average of $13.89. Meanwhile, GATX Corporation (GMT) climbed 6.2% to close at $41.50, moving past its 200-day moving average of $40.62.

Hawaiian Holdings (STNG) fell 3.5% to close at $6.30, moving closer to its 50-day moving average of $6.29. Also, the stock moved closer to its 200-day moving average of $6.16. Diana Shipping (DSX) rose 2.7% to close at $7.10, approaching its 50-day moving average of $7.39. It has also moved closer to its 200-day moving average of $7.94.