Looks like people are already doing that: <a href="http:&#x2F;&#x2F;www.cnbc.com&#x2F;2015&#x2F;10&#x2F;30&#x2F;why-investors-are-shorting-canadas-housing-market.html" rel="nofollow">http:&#x2F;&#x2F;www.cnbc.com&#x2F;2015&#x2F;10&#x2F;30&#x2F;why-investors-are-shorting-ca...</a>