What is the reason to own Dell on the 11th? No one "should" know what the numbers will be like until they are announced. It's real simple. If the numbers are good one could buy after the announcement if they are bad you could either direct your attention somewhere else or short. If you own it today and sold on Monday you could always buy it back after the announcement if the numbers are good, there should be plenty of room on the upside at that time but if the earnings are poor you've gambled and lost. Why gamble?