Mumbai: Investors could subscribe to the upcoming offering of Sovereign Gold Bond as prices of the yellow metal appear undervalued after the recent weakness, said fund managers and analysts. Over the next 12 months, investors can allocate up to 15% of their portfolio to gold. In the fifth tranche of SGB this fiscal, investors will have to pay Rs 4,740 per gram of gold after the Rs 50 per gram discount for digital payments. The issue will close