Why are Funds Available for Cash different when Im buying stocks than when buying mutual funds?
Stock trades settle T+3, so you may place an order for a trade while having only 50% of the required cash in your account. The remaining cash would need to be deposited before the settlement date. Many mutual fund trades, however, settle T+1, so you must have 100% of the required cash to cover the size of the trade in your account at the time you place the order.