REUTERS/Dado Ruvic/Illustration/File Photo Acquire Licensing RightsMADRID, Nov 8 (Reuters) - Spain's stock market supervisor said on Wednesday it had opened its first case relating to a possible infringement of recent rules governing mass advertising campaigns of cryptoassets. The CNMV said on Wednesday that it had opened disciplinary proceedings against Spanish technology provider Miolos S.L. over two mass campaigns advertising cryptoassets. Advertisers and companies that market cryptoassets must inform the CNMV at least 10 days beforehand about the content of campaigns targeting more than 100,000 people. Spain's rules also apply to cryptoasset service providers when advertising their activities and to any person advertising on their own or on behalf of third parties.

---

Persons: Dado Ruvic, Madrid, CNMV, Miolos, Rodrigo Buenaventura, Buenaventura, Jesús Aguado, Emma Pinedo, Inti Landauro, Alexander Smith Organizations: REUTERS, Rights, Spanish, Miolos, Thomson Locations: Rights MADRID, cryptoassets