Beware that such a mutual fund buy transaction closes at end of day. A sale of a stock or ETF closes 2-3 days in the future. So if you place both orders concurrently in your margin account, you may find you've borrowed from Schwab for those 2-3 days on margin, at a rate of ~10%. Schwab's order screen will not warn you of this in advance.
What happens if you make this mistake in a "cash account" i.e. no margin allowed I do not know and hope not to find out by means of usual accidental carelessness.
An alternative to SWVXX is VUSB, which trades with standard ETF timing.
What happens if you make this mistake in a "cash account" i.e. no margin allowed I do not know and hope not to find out by means of usual accidental carelessness.
An alternative to SWVXX is VUSB, which trades with standard ETF timing.