Vasco Data Security Has Near 100% Upside, Sidoti Analyst Says By: Benzinga via Benzinga October 06, 2015 at 14:19 PM EDT Shares of VASCO Data Security International, Inc. (NASDAQ: VDSI) surged higher by 8 percent Tuesday morning, but are still lower by ... Read More >> Related Stocks: Bio-Techne Corp VASCO Data Security International, Inc. - Common Stock