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Options trader eyes bullish signals in a tech stock

Jon Najarian spots unusual trading volume in Mobileye

Investors seem to be getting bullish on tech stock Mobileye.

Jon Najarian, Co-Founder of Najarian Family Office and Najarian Advisors, spotted unusual trading volume in the company that helps vehicles detect and avoid obstacles.

Shares of Mobileye trading almost 6-percent higher on Friday.

Najarian was watching Mobileye's July 22 expiry 40 strike calls. "They went from $0.75 all the way up to a $1.60 in just an hour and a half," Najarian said.

Jon Najarian owns Mobileye calls and will likely be in this trade for 2-3 weeks.

—By CNBC Producer Bree Kelly. Follow her on Twitter @Bree_Kelly

Trader disclosure: On June 17, 2016, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Halftime Report" traders:

JOSH BROWN: Long AAPL, CORE, DE, DNKN, GE, SAM, SHAK, TWTR, XLE

JON NAJARIAN: Long MGM, SFUN Long Calls FB, GDX, GLD, MBLY, MO, MSFT, SFUN Short Puts: C, DB, FSLR

STEVE WEISS: Long AAL, ATVI, GLD, HZNP, SRPT, VXX

SARAT SETHI: Long AA, AAL, AAPL, ACN, BWA, CSCO, DAL, DGI, DLPH, F, FB, GE, GM, GOOG, HAR, HON, INTC, JWN, LB, M, MSFT, NVDA, QCOM, SJM, UAL, V, WFM, XPO, YHOO, YUM