Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Tesla Motors (Nasdaq: TSLA) popped 18% in intraday trading today after an analyst upgraded the stock.

So what: Morgan Stanley upgraded Tesla to "overweight" with a $70 price target, more than three times yesterday's closing price of $23.71. The analyst believes rising oil prices and increasing government support will create greater-than-forecasted demand for electric vehicles.

Now what: Morgan Stanley, which helped take Tesla public in June 2010, said the company has the "opportunity" to establish itself as the fourth largest automaker in America, with the biggest risk being execution of its plan. It is not clear whether Tesla will ever turn a profit, or even survive. The stock seems pricey for the "opportunity" to become a major auto player -- or another DeLorean Motor Co.

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