This is what is sometimes called a "bear market." Welcome to the real world. What you're now seeing has been long overdue. That said, if you believe in the future prospects of the company, don't panic. Have you never gone into a market and bought something only to see it go on sale the next week for half price? Happens all the time. Get used to it. Look beyond tomorrow or next week. I always wait for a sale to buy things. The sale signs have gone up.