Stock prices rose for a second day in a row Friday as investors bet against a US debt default. Call it the Sigh of Relief Rally. The gains were enough to put the big indexes back into positive territory for the week, except for the Nasdaq. A partial government shutdown pushed the Dow below 15,000 last week before President Obama and House Republicans met Thursday to talk about a possible deal. Obama and GOP senators met Friday. Stocks set new highs in mid-September but declined steadily after that as the Oct. 1 shutdown got closer. Even more troubling is the possibility the government will reach its borrowing limit Oct. 17.