Big blocks traded periodically throughout the day followed by price increase. Somebody taking out all avaiable shares today(hence 3%+ rise). All about supply and demand. Less supply, increasing demand.
The only reason you buy something is that you believe you can sell it for a higher price in the future. There is no other reason. You are not buying something to pay what it is worth, you are buying something in the belief/knowledge that it will be worth much more in the future.