Suppose, we buy the stock for $90, and at the same time sell the call option for $20. Suppose, the strike price is $100. The break-even point equals $70 ($90 – $20). Thus, if the asset price stays below the price mark of $100, that is there’s no active movements in the market now, we can get $20 as extra-profit (it’s premium). And when the stock continues to move up beyond $100 we’ll benefit from the stock movement.