A long position in a security, such as a stock or a bond, or equivalently to be long in a security, means the holder of the position owns the security and will profit if the price of the security goes up. An investor goes long on the underlying instrument by buying call options or writing put options on it.
I wonder if "write" means "sell" and "read" means "buy"?
Now come to the meaning of "writing put options" in the quote. If interpreting "write" as "sell", "writing put options" means selling the put option. But it is the buyer of a put option not the seller who has the right to choose whether to trade the underlying instrument in the future, and therefore the seller cannot be benefited from the price of the underlying instrument increasing. So I wonder if "writing put options" means selling the put options or selling the underlying instruments?