Short selling is used used as a hedge against downside risk of a long position
Not accurate, assuming you're talking about the same stock. Shorting a stock is precisely equivalent to selling it, and your brokerage will always net them out. Perhaps you're thinking of OTM put options?
>A "short sell against the box" is also known as "shorting against the box." Sellers use this technique when they do not actually want to close out their position on a stock. The strategy is generally used by investors who believe the stock is due for a fall in price, but do not wish to sell because they believe the fall is temporary and the stock will rebound quickly.
Not accurate, assuming you're talking about the same stock. Shorting a stock is precisely equivalent to selling it, and your brokerage will always net them out. Perhaps you're thinking of OTM put options?