The value of Thane-based tech consulting company Silverline Technologies' shares has more than doubled in just 26 days, rising over 106% from ₹7.81 on January 19 to ₹16.15 on February 16. The company's shares have risen over 27% in just one week since February 9. BSE advised investors to exercise caution, noting unsolicited messages being circulated about Silverline's shares.