Aurora Cannabis Inc. (ACB) shares soared 46% in the last trading session to close at $9.23. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 46.6% gain over the past four weeks.The sharp upsurge in Aurora's shares can be attributed to the DEA's reported decision to reclassify marijuana from Schedule I (reserved for drugs with a high potential for abuse) to Schedule III (reserved for drugs with a moderate to low potential for physi ...