Shari'a compliant Savings account
Assalamu alaykum
I am curious, are there some sort of alternatives to savings accounts, especially in Fidelity? I use Fidelity to invest into shari'a compliant stocks, ETFs, and mutual funds. But I would like to have some extra cash always available, just in case I wanna quickly buy something during a dip. That cash, if sat too long, gains interest, which I then have to clean up through sadaqa. So, I was curious if there is some alternative to that cash savings account I can quickly put money in/out?