How low will Nokia stock have to go before Microsoft buys the company?

ComputerWorld – Nokia's stock price is falling through the basement — down to $1.82 as I write this, around the same price it was trading back in 1994. How low does Nokia's stock need to go before Microsoft steps in and buys it?

At this price, Nokia is worth less than $6.9 billion. Although that's not chump change, even for Microsoft, buying it would be a good deal for Microsoft — maybe even a necessary one. Nokia is Microsoft's biggest partner by far for Windows phones, and without Nokia, the struggling smartphone operating system won't likely survive.