Those calls lock in the price of Barrick shares for the buyers, which means that these options can move sharply if the stock rallies. If it doesn't move in the right direction, however, the contracts will expire worthless.
The gold miner closed at $49.93 yesterday, up 0.79 percent. Our systems also identified bullish activity in another mining company, New Gold, and in the SPDR Gold Trustexchange-traded fund , which tracks the price of the metal.
More than 39,000 Barrick contracts crossed our screens yesterday, which is more than twice the daily average in that name. Barely 4,000 of those were puts , reflecting the day's bullish sentiment.
— Najarian has no positions in ABX.
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Pete Najarian is a professional investor, CNBC contributor, regular co-host of CNBC's "Fast Money" and co-founder of OptionMonster.com.