Cardiac tamponade can occur due to: 1  Dissecting aortic aneurysm (thoracic) 2  End-stage lung cancer. 3  Heart attack (acute MI) 4  Heart surgery. 5  Pericarditis caused by bacterial or viral infections. 6  Wounds to the heart.
Bid vs. ask and why yields matter. With many investments, the concept of bid and ask applies to prices. The bid price is what a buyer is willing to pay for a security, while the ask price is what a seller is willing to accept for the same security. The difference between those two numbers is known as the bid-ask spread, and in general, the narrower that spread, the more liquid the market is.
Definition: The ask or offer price is the lowest price that a seller is willing to accept for a stock or other security. The ask size will specify the number of shares the seller is willing to sell at that ask price. This is also sometimes called âthe askâ or âask priceâ or âoffer price.â. Example: When you get a quote on a stock or security you will often see the Last Trade Price and the current Bid/Ask prices. For example, Google might have a Last of $700.75 and be Bid $700.50 and Ask $701.00.