Check all that apply:

A) Among the risks associated with short selling a stock are:

- Default risk: potential unlimited losses when buying back the stock.

- Regulatory risk: a ban on short sales can create a surge in the stock price.

- Dividend risk: the short seller must provide dividend payments on the shorted stock to the entity from whom the stock has been borrowed.

- Systematic risk: the uncertainty inherent to the market as a whole and which cannot be diversified.

B) Leveraging your portfolio: (check all that apply)

- Allows you increase your return on equity, magnifying positive (or negative) returns by borrowing money.

- Increases your default risk by magnifying the standard deviation (risk) of your portfolio.

- Does not increase the standard deviation of your portfolio, since the borrowed money is risk free and therefore has a standard deviation of zero.

- Increases systematic risk within your portfolio, that is the uncertainty inherent to the market as a whole and which cannot be diversified.