Marc Chandler, global head of currency strategy at Brown Brothers Harriman, said market watchers should keep an eye on the meeting next week between France and Germany to help calm markets.
However, comets are unpredictable and can break up or fizzle out altogether even on their approach to the Sun - so sky watchers will surely keep their eyes on Ison.
Market watchers said by the end of next week, many more investors will keep an eye on the back and forth between the selected members of the Joint Select Committee on Deficit Reduction, known as the super committee.