Trader: Bet on these 5 winning trends

Source: Palo Alto Networks

CNBC "Halftime Report" trader Joe Terranova reconstructed his model portfolio, choosing five investment themes he believes will lift him up to the top spot in the contest.

After taking a conservative approach in the first half of 2015, the chief investment strategist at Virtus Investment Partners thinks it's time to turn things around and bet on this year's key trends.

One of his top stock picks for the second half is Palo Alto Networks, a network security firm.

Here's why the trader is making the stock a top pick for his model portfolio in the CNBC Pro competition.