Investors list contains the following calculated columns: Balance - This amount of funds on the investor's balance. Total Bidden Amount - the sum of all investor's bids that are are in the Submitted status.This amount is currently a part of the BananceBalance, but can't be used to place new bids. Example: Balance = $1000, Total Bidden Amount = $800. In such case, the investor can only place new bids for $200