"The wash sale rule prevents you from claiming a loss on a sale of stock if you buy replacement stock within the 30 days before or after the sale." I have elected Mark to Market accounting so I don't have to worry about wash sales but how does it affect all the accounts in the Friends and Family Accounts? Someone without Mark to Market could owe taxes for a trading year they never made money on if they keep trading the same securities. I'm concerned that family members would have problems since they don't have the election. Does anyone here use the IB Friends and Family and trade the same securities regularly? Do wash sales apply to the accounts you are trading for? Thanks for any responses!