When valuations are high and sentiment is bullish, one thing which should be kept in mind is that volatility knocks the market without giving any notice. Pretty much as it did in the last week.
The bigger problem, also volatility in the market can make even the best of the rational minds swayed by news flash and there is high probability that wrong decisions, both of buying and selling are taken. As an investor, one needs to look at every sector. Read more on economictimes.indiatimes.com