As heard shouted in Braveheart 'HOLD'. You don't win a battle by reacting early, even when it seems that everything is falling down around you. Use the opportunity to pick up more and bring down your average purchase price. Don't panic sell and end up regretting it later. If you do sell, make sure it is for the right reasons. There is nothing worse than selling and then seeing the investment rebound almost instantly. Hold your positions, which if the advice given to anyone investing - 'only invest what you can afford to lose' - is followed, then it should be a given.