Given the way market breadth is panning out one is not far from a phase, where the probability of reading, nifty and sensex have touched new high becomes a regular feature. Now there are a couple of things which one needs to ensure in such times. Staying with age old and basic principles of investing which is focussing on fundamentals of business and management. Take time to select stocks and then stay with them with a long term perspective. In bull markets all segments of stock do well, but interest is always high in mid and small cap, because the price action is more in that segment. If one is able to find the right stocks then one may get higher than normal return. But don't forget the one simple principle that the risks in a bull market are higher and while being bullish it is important to be cautious also.