One of the greatest advantages of usin the P/E ratio for valuation purposes is its simplicity , while one of the greatest disavantages is that it uses one year data(short) . Please compare and contrast the significance of these specific advantage /disavantage for small versus investor. Is simplicity more or less important for a large investor or for a small investor Is the short data used (one year) more or less important for a large investor or for a small investor?