Correct. You can do a debit spread in both a call debit spread or a put debit spread. A debit spread is where you simultaneously buy and sell an option at different strike prices with the same expiration date. A call debit spread is where you are buying a call option (typically near the current stock price) and then sell an option at a higher strike price than the call option you bought. The difference in the premium between the option you bought and sold leaves you with a small debit to be paid to enter. The larger the spread of the strikes the larger the gain. You do this strategy cause you aren't susceptible to IV crush like you are with regular put and call options, your max loss is the debit you paid, and are able to enter high reward option trading on expensive stock for a much lower price. You can do this same type of strategy with a put as well. Your max gain on this strategy is the difference in the two options strike price minus the debit you paid to enter.
The opposite side of the coin is a credit spread which is where you are paid to do essentially the same thing. The issue with credit spreads is you could be assigned the call/put you sold early which means you have to end up covering your naked contract within 24 hrs.
A debit spread is a strategy of simultaneously buying and selling options of the same class, different prices, and resulting in a net outflow of cash.
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