As of now, TD Ameritrade does not have Ethereum available to trade on their platform. They may add it in the future, but there is no concrete plan to do so at this time.
This is a shame, as TD Ameritrade is one of the largest and most popular online brokerages in the United States. If they were to add Ethereum, it would greatly increase the visibility and legitimacy of cryptocurrency.
At this time, investors who want to trade Ethereum will need to use a different brokerage. However, there are many great options available, so finding a good one should not be difficult.
In conclusion, TD Ameritrade does not have Ethereum available to trade on their platform at this time. However, they may add it in the future.
In the meantime, investors will need to use a different brokerage to trade Ethereum.