The platinum bid price and the platinum ask price are the prices at which platinum can be bought and sold, respectively. The platinum bid price is the highest price the buyer is willing to pay for platinum. When selling platinum, a dealer will purchase platinum at the bid price. The platinum ask price is the lowest price the seller is willing to sell platinum. When buying platinum, a dealer will sell platinum at the ask price. The difference between the platinum bid price and the platinum ask price is called the bid-ask spread, which can vary based on the current supply and demand in the market, transaction size, as well as other factors.