It was a tough month for investors in the electric vehicle (EV) sector, with negative headlines on multiple fronts. For long-term investors, though, that makes it a good time to analyze whether the drops are opportunities to add shares or see if the new reality is thesis-changing.

EV charging station network company ChargePoint (NYSE: CHPT) lost a whopping 48.9% last month. The stocks of electric heavy truck maker Nikola (NASDAQ: NKLA) and Chinese EV maker (NYSE: NIO) dropped by 31.2% and 19.2%, respectively, according to data provided by S&P Global Market Intelligence.

For one of these names, a bit of news in the sector last month could indeed mean it's time to sell and move on.

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Source Fool.com