Shares of experimental solid-state battery maker QuantumScape (NYSE: QS) are all shook up on Monday, first dropping 2% then erasing those losses and popping more than 4% higher -- and then giving back some of those gains, too. As of 12:30 p.m. ET, the stock was up about 1.6%.

What's to explain investors' inability to make heads or tails of where QuantumScape's going today? The better question is who is to blame. And the answer is investment bank .

In a note covered on The Fly this morning, HSBC announced it is initiating coverage of QuantumScape. That's the good news. The bad news is that HSBC's opinion of the stock is that investors should "reduce" their exposure to it (i.e., if you own it, sell it) -- and that this stock, which costs nearly $7 at present, is actually worth closer to $4.70 a share.

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Source Fool.com