General Motors' (NYSE:GM) stock was part of the benchmark S&P 500 Index for decades, but was kicked out when it entered bankruptcy in 2009.

It could soon be back, though: GM has recovered well from its near-death experience, and now meets all of S&P's criteria for inclusion. In this video, Fool.com contributor John Rosevear explains why rejoining the benchmark index is important to GM -- and why it could be a very good thing for GM investors.