Regulators issue tighter rules on blockchain stocks

Share prices of blockchain-related companies on China's A-share market plunged on Wednesday after the Shanghai and Shenzhen bourses announced tightened regulations to crack down on irregularities and avoid risks.

The "blockchain concept" stocks lost 4.54 percent, or 55.46 points, to end at 1166.10 points on Wednesday.

Blockchain is a new computer technology that combines the application of distributed data storage, point-to-point transmission, encryption algorithm and other advanced technologies, providing a high level of security. It is considered a good way of protecting privacy.