Stock market news live updates: Stock futures extend gains, pointing to a higher open

Stock futures rose Tuesday morning, adding to gains after a rebound rally a day earlier.

Silver futures (SI=F) fell more than 6%, after derivatives exchange CME Group increased margins on Comex silver futures by nearly 20%, Bloomberg first reported, in a move that would increase the cash needed to trade the contracts. The commodity’s prices soared on Monday to breach $30 per ounce, touching its highest level in eight years as some online traders pivoted to target silver after last week’s surge in heavily shorted stocks.

By Yahoo Finance