Money market funds aren't the same as cash when it comes to margin loans. Understanding the key differences can help avoid surprise margin loans and interest charges.
Margin increases potential return—and risk. To help protect clients and the firm, Charles Schwab uses a risk-based concentration model to set margin requirements.
Short selling involves the sale of borrowed shares in the hope of profiting from a decline in the stock price. It's risky, but it also adds to market efficiency.