Jon Najarian Sees Unusual Option Activity In Microsoft, ON Semiconductor And Teck Resources

On CNBC's "Fast Money Halftime Report," Jon Najarian gave some unusual option activity plays.

Najarian sees unusual activity in:

• Microsoft MSFT March 19 $237.5 calls
• ON Semiconductor ON April 16 $43 calls
• Teck Resources TECK April 16 $25 calls

He will hold his position in ON Semiconductor for most of the next month and will hold his position in Teck Resources for approximately a couple weeks.