FWIW - Any brokerage house I have ever dealt with has always used FIFO as their default disposal method. I currently have brokerage, retirement, health savings and trust accounts with Fidelity. Their default disposal method is FIFO for all types of accounts. However, I am able to change the default disposal method on any of my accounts. The choices I have are as follows: FIFO; LIFO; Intraday First In, First Out; High-Cost; High-Cost Long-Term; High-Cost Short-Term; Low-Cost; Low-Cost Long-Term; Low-Cost Short-Term; Tax-Sensitive; and Tax-Sensitive Short-Term. I would suggest you go into the particular account you are utilizing and access its Cost Basis Information Tracking to see which disposal methods are offered to you to choose from...