Just read from MarketWatch that a columnist there named Anthony Mirhaydari recommends shorting SNE (http://www.marketwatch.com/story/the-market-is-starting-to-panic-2013-10-08). There may be some reasons for it.
It's just the Nikkei 225... Look at Toyota, they are also down 10% over the last 10 days... Japanese markets are notoriously known to exaggerate the market movement we have in the US. In addition the Japanese market is up 70% this year, 40% more than the S&P, sony has doubled, there's a lot of profit takers right now who don't want to see those gains evaporate because of the stupidness of washington. Use this weakness to buy incrementally. It's possible we even drop to 17.... Just don't panic, there's nothing wrong with Sony. Provided we don't default, this is a great opportunity for anyone with a longer time horizon, I mean, I rather sony fall because of world problems than it's own problems, the fact that there is no bad news means you should be buying every dip.