The market has been seesawing all week, but now things appear to be heading only downward. The Dow fell more than 700 points at the open on Friday, nearly 3%, and the benchmark S&P 500 fell a similar percentage. The move follows Thursday's plunge of nearly 1,000 points for the Dow. The selloff in stocks comes as investors flee to safer havens such as bonds, reports the Wall Street Journal. One sign of that: The 10-year Treasury yield sank to a historic low of below 0.7%, reports CNBC. Gold, up 0.3%, is on track to have its best week since 2008. (More stock market stories.)