Top trader Joe Terranova buys more Facebook

Chief market strategist for Virtus Investment Partners Joe Terranova
Adam Jeffery | CNBC

CNBC "Halftime Report" trader Joe Terranova bought more Facebook for his model portfolio on Tuesday.

The portfolio is up 9 percent for the year.

In another move, the trader added to his ProShares Ultra VIX Short-Term Futures ETF stake.

Here's why he added to his position in the social media company.