Not sure what will happen if the stock market takes a big slide, but it could be bad. Both this financial expert (see link) and Tom Sullivan, a financial expert who has his own talk radio show and is on a business show on FOX, predict this will occur (Tom thinks in the first quarter of 2014).
http://finance.yahoo.com/news/icahn-cautious-stocks-not-walk-away-apple-202647025--sector.html
http://finance.yahoo.com/news/icahn-cautious-stocks-not-walk-away-apple-202647025--sector.html