What is a 'Put Option' A put option is an option contract giving the owner the right, but not the obligation, to sell a specified amount of an underlying security at a specified price within a specified time. This is the opposite of a call option, which gives the holder the right to buy shares. BREAKING DOWN 'Put Option'
High Altitude Sickness and Everest Base Camp. One of the major challenges facing trekkers heading to Everest Base Camp or any other high elevation trek in the Himalayas is dealing with the potential threat of High Altitude Sickness. The primary cause of High Altitude Sickness is a decrease in the amount of available oxygen with altitude.
Here is a classic scenario for developing a high altitude illness. You fly from New York City to a Denver at 5,000 feet (1,525 meters). That afternoon you rent a car and drive up to the trailhead at 8,000 feet (2,438 meters). You hike up to your first camp at 9,000 feet (2,745 meters).