QuantumScape Corporation (NYSE:QS) is one of the top performers this week. Its shares extended gains to a ninth day, reaching another all-time high. Investor confidence is high due to a new production milestone, the Cobra separator, which offers significant improvements in speed and space efficiency. QuantumScape is set to release its Q2 earnings on July 23.

Read more at Yahoo Finance: QuantumScape (QS) Extends Rally for 9th Session Ahead of Q2