ETF Securities, the London-based exchange-traded fund issuer known for its commodity-based products in the US, launched its first equity-based products in collaboration with US investment-research giant Zacks recently. The two funds – the ETFS Zacks Earnings Large-Cap US Index Fund (ZLRG) and the ETFS Zacks Earnings Small-Cap US Index Fund (ZSML), focus solely on US large-capitalization and small-cap stocks only. …