That depends on your risk profile. Are you going to freak out if your portfolio loses 30% of its value in a year? Then maybe move to a more balanced portfolio. If you are happy to wait and let things turn around again, then stay the course. Timing the market is generally not recommended because the people that do this every day have a much better grasp on what is going on than the public in general and they will have already responded en-masse before you can, so at best you are hoping to get lucky.