When you transfer funds from your High-Yield Cash Account to your Brokerage Account you can use those funds for trading instantly! You can also withdraw these funds from your brokerage account to your bank account if you initiate your transfer between 7AM to 8PM EST on market open days (otherwise, funds will be available to withdraw on the next market open day).
For further questions regarding your High-Yield Cash Account please contact Member Support via in-app chat or email at support@public.com.