Some symptoms to keep an eye out for include: 1  Chest pains or shortness of breath. 2  Chills or fever. 3  Coughing. 4  Headaches and muscle aches. 5  Rashes.
The buying of a security such as a stock, commodity or currency, with the expectation that the asset will rise in value. 2. In the context of options, the buying of an options contract. Opposite of short (or short position).
Stock markets work the same way with a few special players. When an investor wants to buy or sell stock, she places the order through her broker. The broker then contacts the market where the security is traded to get the order filled. On the exchange a specialist or market maker works to fill the order.