When it was launched, paper gold in the form of Gold ETFs was an effective way of transacting in the yellow metal eliminating the troubles that came with physical gold. Likewise, we would have the soon-to-be-launched Silver ETFs. Securities and Exchange Board of India (Sebi) on Wednesday announced the operating norms for silver exchange-traded funds (ETF). The norms include specified guidelines for investors regarding investments in silver ETFs including valuation, determination of net asset value (NAV), tracking error as well as tracking difference and disclosure requirements.