When a company's stock drops 6% in a single trading session after reporting 20% growth, investors are clearly looking past the headlines. Titan Company's June quarter update revealed exactly why: despite overall consumer business growth of 20% year-over-year, the core jewellery segment managed just 18% growth—well below Street expectations of 22-23%.More troubling, excluding bullion sales, jewellery growth was only 17%, significantly below expectations of 27%-28%, a sharp deceleration from the 25% pace that had justified the stock's nose-bleed valuation of 65 times forward earnings.