When the strike price is less than the actual trading price of the underlying stock ,The owner of the Call has the right to buy the stock at a price which is less than the price he or she would have to pay to buy shares in the open market .
Xpert Comments
This is when your stock option is worth money and you can turn around and sell or exercise it for a profit. As the call option moves deep into the money the delta approaches 100% ,so any the change in price movement in the stock would be similar to the price in option so ,Thus, investing in the option is similar to investing in the underlying asset, except the option holder will have the benefits of lower capital outlay, limited risk, leverage and greater profit potential.