Sintana Energy shares plunged 13.2%–18.9% on heavy volume, with no official reason given.

Sintana Energy (CVE:SEI) shares dropped between 13.2% and 18.9% on Tuesday, closing between C$0.43 and C$0.46 amid a surge in trading volume—ranging from 2.7 million to 4.4 million shares, up over 600% to 1,070% above average. The Toronto-based oil and gas explorer, with licenses in Namibia and Colombia’s Magdalena Basin, has a market cap of C$157.77 million and negative P/E of -10.38. The stock traded below its 50-day (C$0.53) and 200-day (C$0.60) moving averages, but no specific reason for the decline was provided.