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.
Number of people to successfully climb Mt. Everest: 660. Number of people who have died trying to climb Mt. Everest: 142. Height: 29,028 feet, or 5 and a half miles above sea level. This is equivalent to the size of almost 20 Empire State Buildings. Location: part of the Himalaya mountain range; straddles border of Nepal and Tibet.