A large part of yesterday’s surge is pure hype, but $NOK still clearly stands out from the WSB short-squeeze crowd. GME and BB are different stories, even though the group behind the stock movements is the same. Shorts have nothing to do with Nokia’s rise. The company’s hype is justified by Nokia’s business and undervaluation, seriously.
NOK is trading at a Price/Book ratio of 1.3x, compared to it’s peers average of 4.0x and the sector average 2.2x
NOK is also undervalued in terms of Price/LTM sales. It has a ratio of 0.9x, it’s peers trade at an average of 3.9x, and the sector average of 1.8x
To establish the Fair Value Estimate, we’ll use 2 models taking input from previous NOK financials, as well as data from competitors. (Competitors include: CSCO, ERIC, MSI, MSFT, and AAPL.
P/E Multiples: $14.94 target
Earnings Power Value: $15.64 target
The average for the 2 models imply a Fair Value Estimate of $15.29
I wouldn’t push Nokia’s value quite that high, no matter how much one might inflate the outlook, but the fact is that the huge difference in valuation, for example, compared to many Helsinki counterparts, as @Juurikki pointed out, is a fact. How much, then, should Nokia’s situation improve for a P/E of, say, 30-40, to be justifiable? Hard to say.
Be that as it may, in WSB, Nokia’s “fair value” in the -sensible- posts is $15-$25. That suits me just fine. 
Behind it all is global hype, not just in the USA. And this #Call-squeeze phenomenon cannot be ignored. The stock’s development is difficult to predict, but with options trading heavily around ten dollars, this activity will likely continue until tomorrow - and possibly for a long time thereafter.