This document is a report that examines the evolving landscape of exchange-traded funds (ETFs), particularly focusing on the distinction between active and passive ETFs. It outlines the historical context of ETFs, noting that while most have traditionally been passive, there is a growing trend towards active ETFs as fund managers recognize the potential of ETFs as investment vehicles. The report details the characteristics of passive ETFs, which aim to track specific indices without attempting to outperform the market, and contrasts them with active ETFs, which are managed with the goal of achieving higher returns than a benchmark index. The document also discusses the transparency of active ETFs and the concerns surrounding proprietary trading strategies, introducing the concept of semi-transparent ETFs as a solution to these issues. Additionally, it highlights the emergence of Smart Beta strategies that blend active and passive approaches, providing investors with more options in their investment strategies. The report concludes by noting the increasing popularity of ETFs and the operational challenges associated with converting mutual funds to ETFs.