painting the tape การใช้

• The practice is called " painting the tape ."
• "Just because there's increased volume doesn't mean they're painting the tape, " said Lynne Howard, a spokeswoman at the Chicago Exchange.
• Another technique involves painting the tape with a chemical substance that allows the patterns to be seen under a special light and then possibly digitized into computer data and evaluated.
• There were rumblings, however, from traders in Philadelphia that the Chicago traders were illegally " painting the tape " _ or inflating volume by trading among themselves _ but officials at the Chicago Exchange dismissed such notions.