Gold sees its biggest gain in years. Miners are boosting production to keep up.
1. Gold prices surged 3.5%, reaching a record $4,359.40 an ounce. 2. Central banks are diversifying reserves as the dollar declines in attractiveness. 3. Increased demand from institutional investors due to supply constraints noted. 4. New mines are beginning production as older ones become economical. 5. SPDR Gold Shares ETF gained 3.5%, surpassing $400 for the first time.