Do you have a junior miner? If you answered "yes", the big investors may be looking at you as they keep buying these companies. Hong Kong's Regent Pacific, a mining investment group, has formalised a US$ 345 million bid for Australian junior miner BC Iron. It represents a 4% per cent premium to the shares' last close, and an 18% premium to the shares' one-month volume-weighted average. BC Iron's board unanimously urged shareholders to accept the offer.