Stock markets continue to impress and the bull run in the FTSE 100 has its sights set on the 7,000 level. With price activity trading this close to a clearly defined psychological level, it would not be at all surprising to see an upward break. But the real question is whether or not a move like this would actually show sustainability in the coming months. This is a critical question for those that are considering long exposure while valuations are trading at such elevated levels. Clearly market momentum is still positive but traders entering late still run the risk of being caught long at the wrong market price. For these reasons, newer investors must assess the underlying strength of the blue chip stocks that actually make up the FTSE 100.