General Motors Stock: Buy, Sell, or Hold?

It's not just the high-flying tech stocks that are performing well lately. Established carmaker General Motors (GM -0.83%) has seen its shares soar 45% just in the last four months as investor sentiment shifts into high gear. That gain beats the S&P 500 during the same period.There are a lot of different factors to consider before investors can decide what to do with GM as it relates to their portfolios. Let's analyze both the positive and negative factors surrounding this business and stock.The bullish cas ...