So this is an investment account ? If you are not FDIC insured, can you guarantee that I will not lose any money at any time ? If not, it is not really a checking account in my opinion. With my brokerage account, I can already sell securities whenever I want and take the cash out (with tax consequences). Aren't you essentially doing the buy/sell for me but everything else applies just like any investment/brokerage account ?
Yes, you are completely right, this is an investment account with the money management and instant cash access features of a checking account. It is not FDIC insured and you can lose money.
We are buying and selling the stock in such a manner that you get instant access to cash (e.g. at the ATM), which would be impossible or very tedious if you did this manually :-)