Imagine an investor who has two accounts at the same broker. One is a living trust account and the other is an individual brokerage account. Now the investor wants to move money from one account to another without doing any written paper work. That is, the investor wants to do it all electronically. In addition to move money from one account to the other at the brokerage firm requires a written signature. The investor has a checking account at a bank and can electronically transfer money between the checking account and either brokerage account.
Suppose on Monday the investor starts a transfer from one brokerage account to the checking account. On Tuesday, the investor starts a transfer from the checking account to the other brokerage account. Can the investor count that the money from the first transfer will be there when the second transaction comes in?