Arbitrage
: When a purchase and sale of a security takes place simultaneously in different markets, with the aim of making a risk-free profit through the exploitation of any price difference between the markets.
Asset beta
: An ungeared beta ie only measures business risk.
Equity beta:
A measure of the systematic risk of a share, including its business and financial risk.
Capital structure:
The capital structure of a company refers to the mixture of equity and debt finance used by a company.