Due to overwhelming debt and an extremely low market cap, they're about to replace GM in the Dow Jones Industrial Average. They do this periodically whenever a stock in the index slides, and often move something in that makes it look better over time. This is how they disguise the downward bias of the stock market in general, they used a tiny index of 30 or 500 stocks vs the 9500 that trade as indicators of the market's "success". It's not a fair comparison over time, as few stocks in the Dow in 1928 are even around today.

"The company will probably be removed from the Dow Jones Industrial Average", said John Prestbo, the editor and executive director of Dow Jones Indexes.

Standard and Poor's adjusts its index of 500 stocks annually, removing those smallest in market cap - which means they went down in price - with some that are now bigger -which means those that went up in price, or were new IPO's that succeeded, like Google, Mastercard, and Burger King. So even from year to year the components are not the same, as the failing stocks are removed for healthier ones. At least with 500 in the index, the effect is minimized of this "gerrymandering"; its has less effect than it does on an index as small as the Dow 30.