For IBKR, I have some extra cash in my account but I want to keep it liquid for a while to invest later. What should I do with the extra cash?

I don't think IBKR has a similar guaranteed money market fund-like investment vehicle which FSMOne offers. Closest proxy I would reckon would be short term bond ETFs such as the iShares Short Treasury Bond ETF (SHV), iShares Short Maturity Bond ETF (NEAR), SPDR Bloomberg Barclays 1-3 Month T-Bill ETF (BIL), and Invesco Ultra Short Duration ETF (GSY)

Hi there,

The important thing to note in your case here is, opportunity cost. How much extra cash do you have in the account? Is it a substantial amount where you can earn decent interest in say, multiplier account etc while still maintaining liquidity?

And when you say keep it liquid for awhile does it mean you have a security in mind to but just waiting for your entry price? If this is the case then yes a set a buy limit and leave the cash in your account.

All the above variables will affect what you can do and I Guess only you yourself can work through your options and decide on your best course of actions.

There’re plenty of ambiguities in your question, so the thing to remember is opportunity cost. Can the money be placed somewhere to make it work harder?