Versarien shares plunged 30%, closing at GBX 0.01, on heavy volume with no explanation provided.

Versarien (LON:VRS) shares dropped 30% on Wednesday, hitting a low of GBX 0 and closing at GBX 0.01, after trading volume surged to 515 million shares—362% above average. The company, which supplies graphene-based materials and engineering solutions globally, has a market cap of £420.7 million, a debt-to-equity ratio of 655.61, and negative earnings. No reason for the plunge was given.