Said it before and I'll say it again. If you believe in Dolby, its outlook, and feel it is underpriced (especially with a big drop in risk today as earnings are now known to continue to soar), then take advantage of a red day to be a buyer.
Dolby is not like Exxon (running out of product to sell), nor anything to do with GM (what are people worried that Dolby can't sell a Dolby radio to a GM SUV). If a market is being retarded, use the blessing.
I had over 17% portfolio of DLB, and am taking the good values to get more (tipping in at over 28%). And that is only limited by cash reserve powder kegs for opportunities like today. For every buyer, there is a seller.
My theory fwiw is that some instiutions, hedge funds need to rasie $$ to counter their losing positions and sell on price jumps. Buying down here. Accumulating enough shares for long term and to trade as stock seems to have a pattern of low mid 30's to low to mid 40's.