Plug stock has never earned a profit. But its investors got a 60% profit last week.

Plug Power ( PLUG 7.74% ) stock soared to close at $3.81 per share Friday, a 60% gain for the week. The hydrogen fuel stock actually only had one "down" day all week long, and its ascent looks set to continue today, with the stock up 4.5% through 10:35 a.m. ET.

The question is why.

What H.C. Wainwright said about Plug stock

The most obvious answer is that last week, analysts at H.C. Wainwright more than doubled their price target on Plug stock, from $3 to $7 a share. With Plug shares costing less than $3 at the time, you can see why that might get investors excited.

It didn't hurt, either, that Wainwright posited the potential for Plug stock to create a short squeeze last week. In the age of

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