Invesco Energy Fund (Investor Shares) was ranked No. 1 of 34 Natural Resources Funds for five years, No. 4 of 47 for three years ending December 31, 2010. Lipper did not provide a 10-year ranking for funds in the Natural Resources category. Invesco Energy Fund (Institutional Shares) was ranked No. 1 of 47 Natural Resources Funds for three years ending December 31, 2010. The share class inception date was January 31, 2006.

The Lipper Fund Awards program highlights funds that have excelled in delivering consistently strong risk-adjusted performance, relative to peers. The awards are given to funds in 23 countries in Asia, Europe and North America. Lipper designates award-winning funds in most individual classifications for the three-, five- and 10-year periods and fund family awards covering three years.

Lipper Fund Awards are based on Lipper’s Consistent Return calculation. Lipper scores for Consistent Return reflect funds’ historical risk-adjusted returns relative to funds in the same Lipper classification and include each fund’s expenses and reinvested distributions, but exclude sales charges. Consistent Return values are calculated with all eligible share classes for each eligible classification. The highest Lipper Leader for Consistent Return value within each eligible classification determines the fund classification winner over three, five or 10 years. Lipper, a Thomson Reuters company, is a leading global provider of mutual fund information and analysis to fund companies, financial intermediaries and media organizations.

Derivatives Risk. The performance of derivative instruments is tied to the performance of an underlying currency, security, index or other instrument. In addition to risks relating to their underlying instruments, the use of derivatives may include other, possibly greater, risks. Derivatives involve costs, may be volatile, and may involve a small initial investment relative to the risk assumed. Risks associated with the use of derivatives may include counterparty, leverage, correlation, liquidity, tax, market, interest rate and management risks. Derivatives may also be more difficult to purchase, sell or value than other investments. The Fund may lose more than the cash amount invested on investments in derivatives. Investors should bear in mind that, while the Fund intends to use derivative strategies, it is not obligated to actively engage in these transactions, generally or in any particular kind of derivative, if the investment manager elects not to do so due to availability, cost, market conditions or other factors.

Energy Industry Sector Risk. The businesses in which the Fund invests may be adversely affected by foreign, federal or state regulations governing energy production, distribution and sale as well as supply-and-demand for energy resources. Although individual security selection drives the performance of the Fund, short-term fluctuations in energy prices may cause price fluctuations in its shares.

Foreign Securities Risk. The Fund's foreign investments may be affected by changes in a foreign country's exchange rates, political and social instability, changes in economic or taxation policies, difficulties when enforcing obligations, decreased liquidity, and increased volatility. Foreign companies may be subject to less regulation resulting in less publicly available information about the companies.

Management Risk. The investment techniques and risk analysis used by the Fund's portfolio managers may not produce the desired results.

Market Risk. The prices of and the income generated by the Fund's securities may decline in response to, among other things, investor sentiment, general economic and market conditions, regional or global instability, and currency and interest rate fluctuations.

Sector Fund Risk. The Fund's investments are concentrated in a comparatively narrow segment of the economy, which may make the Fund more volatile than non-concentrated funds.

Small- and Mid-Capitalization Risks. Stocks of small and mid-sized companies tend to be more vulnerable to adverse developments and may have little or no operating history or track record of success, and limited product lines, markets, management and financial resources. The securities of small and mid-sized companies may be more volatile due to less market interest and less publicly available information about the issuer. They also may be illiquid or restricted as to resale, or may trade less frequently and in smaller volumes, all of which may cause difficulty when establishing or closing a position at a desirable price.

Synthetic Securities Risk. Fluctuations in the values of synthetic securities may not correlate perfectly with the instruments they are designed to replicate. Synthetic securities may be subject to interest rate changes, market price fluctuations, counterparty risk and liquidity risk.