With the burgeoning electric vehicle industry expanding globally, this backdrop offers a twofold benefit for electric vehicle battery technology specialistQuantumScape(NYSE:QS). First, the obvious point: more next-generation vehicles should translate to greater demand for advanced batteries.

Second, energy-efficient powerplants should help mitigate the coming extra strain on grid infrastructures. So, it's not surprising that QS stock occasionally sees big swings higher.

However, the question is whether the positive momentum can be sustained. Last week, QuantumScape stock gained 17.59% between Monday's opening price and Friday's close. Unfortunately, since QuantumScape entered the public market, its security...