It is day like today when all the indices are trading in red and the leading the fall are mid and small-cap indices, and market breadth is extremely that a large number of investor look at their phones to check how is their portfolio doing, In all probability a large majority finds the decline in their portfolio is more than what Nifty has suffered and that where the doubt and question come to mind. Now two things, especially for those who have turned bulls in the last few months. First nifty or for that matter any indices have nothing to do with your portfolio, so stop comparing them. Second, do a review of your portfolio and ask yourself one simple question: why did I buy this particular stock? Was it friendly neighborhood advice or was it because there was something positive happening in the company or the industry in which this stock belongs? The answer to this question is the key to whether one should stay invested or sell the stock.