For large samples, we obtain excess kurtosis by subtracting 3 units from kurtosis. All other statements are incorrect. All normal distributions have kurtosis equal to 3. A normal distribution is mesokurtic, not leptokurtic nor platykurtic. For a sample of 100 or larger taken from a normal distribution, excess kurtosis greater than 1 is considered unusually large.

Using greater amounts of debt in the capital structure increases the cost of debt because increasing numbers of bondholders are competing for the same earnings stream.

Treasury stock purchases are not considered purchases of assets. Treasury stock purchases reduce the assets (cash) and stockholders' equity of the company.

Significant decreases in the market value of the asset will lead to an impairment of that asset and must be written down.