Silver prices went up by a whopping Rs 285 to Rs 37,510 per kg in futures trade today after participants built-up speculative positions, largely driven by a firming trend overseas. At the Multi Commodity Exchange ( MCX), silver for delivery in March shot up by Rs 285, or 0.77 per cent, to Rs 37,510 per kg in a business turnover of 859 lots. Similarly, the white metal for delivery in May rose by Rs 281, or 0.75 per cent, to Rs 37,746 per kg in 27 lots. Market analysts attributed the rise in silver prices at futures trade to a firming trend in the global markets as falling retail sales in the US cast doubt on the pace of growth in the world’s largest economy, boosting demand for a safe haven.