From Investopedia.com: The traditional idea of a short sale is selling something you don’t have so that you can buy it back at a lower price. The easiest example is stocks. Short sale of a stock involves borrowing stocks from a broker in order to sell them, and when prices fall, buying back the stocks to return to the broker and keeping any profit made.
One option that is similar to shorting of a stock is to invest in ETFs that are short in real estate. These ETFs are typically designed to give inverse returns to a pool of real estate investments, usually REITs. ……..Full Article: Source