Electric vehicle (EV) maker (NASDAQ: TSLA) did something incredible: It caused the entire auto industry to take EVs seriously. Prior to Tesla's mass-market splash, that really wasn't the case.

After it proved that EVs were a legitimate threat to the auto status quo, a number of other companies -- both new startups and auto industry incumbents -- started to make them. There are some interesting things for investors to consider when looking at the recent investment returns here.

Every company goes through cycles, and every industry does too, with good performances followed by bad, and bad followed by good. It's a common sine curve of life played out economically. So investors shouldn't be shocked to see that a $1,000 investment in Tesla a year ago would be worth just $700 or so today. 

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Source Fool.com