The price of gold bullion is volatile, but unhedged gold shares and funds are regarded as even higher risk and even more volatile. This additional volatility is due to the inherent leverage in the mining sector. For example, if one owns a share in a gold mine where the costs of production are US and the price of gold is , the mine's profit margin will be $300. A 10% increase in the gold price to will push that margin up to $360, which represents a 20% increase in the mine's profitability, and possibly a 20% increase in the share price. Furthermore, at higher prices, more ounces of gold become economically viable to mine, enabling companies to add to their production. Conversely, share movements also amplify falls in the gold price. For example, a 10% fall in the gold price to will decrease that margin to $240, which represents a 20% fall in the mine's profitability, and possibly a 20% decrease in the share price.