Bull Campaign: A Bull is optimistic in nature. He makes bargain in the hope of rise in price. When he goes wrong in his forecast, he tries to create a rumour to raise the price level. This is known as bull campaign.
Bear Raid: A Bear is pessimistic in nature. He makes bargain in the huge of fall in price. When he goes wrong in his forecast, he tries to create a rumour to make the price fall. This is known as bear raid.