When you are about to place an order to purchase a stock you have the option to buy now. This means that you are about to purchase the stock at the current price.
If the stock market is closed at the time of the order, it will be executed when the stock market opens and at the price that stock is at the time of eventual execution.
This type of order is called a Market Order.
You can decide to use Bamboo’s fractional investment feature to purchase any percentage of a stock you are willing to buy. You can also buy an entire share or multiple shares.