NEW YORK (TheStreet) -- Trucking and delivery stocks have been mixed so far this year, and overall, technical charts show downside risk. So investors should be wary when investing in companies in this part of the transportation industry.

Here are five such companies, all of them part of the iShares Transportation Average (IYT) - Get Report, an exchange-traded fund. They include Con-way (CNW) , FedEx (FDX) - Get Report, J.B. Hunt (JBHT) - Get Report , Landstar (LSTR) - Get Report and United Parcel Service (UPS) - Get Report. Here are the performance measures and profiles for each of those companies, followed by a graph of UPS.

Con-way ($44.07) is down 11% so far in 2015. It traded as low as $40.72 on Feb. 2, before rebounding by 13% to a subsequent high of $45.92 on Feb. 25.

The weekly chart will shift to negative given a close this week below the stock's key weekly moving average of $44.44. Monthly and annual key levels should be magnets at $42.81 and $43.28, respectively.

Investors looking to buy Con-Way should enter a good 'til canceled limit order to buy on weakness to an annual technical level of $30.33.

Investors looking to reduce positions should enter a good 'til canceled limit orders to sell on strength to a quarterly technical level of $59.81.

J.B. Hunt ($84.41) is up 0.2% so far in 2015. It traded as low as $77.50 on Jan. 14, before rebounding 12% to an all-time intraday high of $86.85 on Feb. 26.

The weekly chart stays positive on a close this week above the stock's key weekly moving average of $83.30. An annual technical level at $85.34 is a magnet.

Investors looking to buy J.B. Hunt should enter a good 'til canceled limit order to buy on weakness to a weekly technical level of $82.19.

Investors looking to book profits should enter good 'til canceled limit orders to sell on strength to monthly, quarter and semiannual technical levels of $87.11, $92.56 and $93.25, respectively.

Landstar ($68.57) is down 4.1% so far in 2015. It traded as low as $63.11 on Jan. 21, before rebounding 15% to a subsequent high of $72.66 on Feb. 23.

The weekly chart stays positive on a close this week above the stock's key weekly moving average of $69.03.

Investors looking to buy Landstar should enter a good 'til canceled limit order to buy on weakness to an annual technical level of $63.68.

Investors looking to reduce holdings should enter good 'til canceled limit orders to sell on strength to quarterly and semiannual technical levels of $71.57 and $72.69, respectively.

FedEx ($174.82) is up 0.7% so far in 2015. It traded as low as $168.03 on Feb. 2, before rebounding 7.2% to a subsequent high of $180.05 on Feb. 18.

The weekly chart stays positive given a close on Friday above the stock's key weekly moving average of $175.13.

Investors looking to buy FedEx should enter a good 'til canceled limit order to buy on weakness to semiannual technical level of $152.04.

Investors looking to book profits should enter good 'til canceled limit orders to sell on strength to monthly and quarterly technical levels of $181.62 and $185.47, respectively.

United Parcel Services ($100.72) is down 9.4% so far in 2015 after setting an all-time intraday high of $114.40 on Jan 22. The daily chart below shows UPS as the weakest of those profiled in this post.

The weekly chart stays negative given a close on Friday below the stock's key weekly moving average of $102.934.

Investors looking to buy UPS should enter a good 'til canceled limit order to buy on weakness to an annual technical level of $87.28.

Investors looking to reduce holdings should enter a good 'til canceled limit order to sell on strength to a semiannual technical level of $108.57.


Courtesy of MetaStock Xenith

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The daily chart for UPS shows that the stock was below its 200-day simple moving average (green line) between July 29 and Oct. 20, when the average was $98.93. The stock then began a momentum run-up to its all-time high of $114.40 on Jan. 22, before it crashed.

UPS plunged 14% from $114.40 to as low as $98.29 on Jan. 29, and has been below its 200-day simple moving average since Jan. 26, with the average now at $102.82.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.