| optionsxpress.com | OptionsXpress |
| optionseducation.org | The Options Industry Council - Your Destination for Options Education |
| iperceptions.com | Customer Satisfaction and Experience Metrics - Attitudinal Analytics |
| etrade.com | E Trade Financial |
| iseoptions.com | The International Securities Exchange (ISE) |
| nasdaq.com | NASDAQ Stock Market |
| yahoo.com | Yahoo! Finance |
| sec.gov | U.S. Securities and Exchange Commission |
| phlx.com | Philadelphia Stock Exchange (PHLX) - United States |
| pacificex.com | Pacific Exchange Stock and Options (PCX) - United States |
United States , Illinois , Chicago