GAMCO Natural Resources Gold Income Trust is a closedended equity mutual fund launched by GAMCO Investors Inc The fund is managed by Gabelli Funds LLC It invests in public equity markets across the globe The fund invests in securities of companies principally engaged in natural resource and gold industries and by writing covered call options on the underlying equity securities It focuses on factors such as recent prices of comparable securities that are publicly traded reliable prices of securities not publicly traded the use of valuation models current analyst reports valuing the income or cash flow of the issuer or cost if the preceding factors do not apply to create its portfolio The fund invests in stocks of companies across market capitalization It benchmarks the performance of its portfolio against the CBOE SP 500 BuyWrite Index Philadelphia Gold Silver Index Dow Jones US Basic Materials Index and SP Global Agribusiness Equity Index The fund was formerly known as Gabelli Natural Resources Gold Income Trust GAMCO Natural Resources Gold Income Trust was formed on January 27 2011 and is domiciled in the United States