We model how ETFs compete and set fees. We show that ETF secondary market liquidity plays a key role in determining fees and leads to liquidity clienteles. More liquid ETFs charge higher fees in equilibrium and attract shorter horizon investors that are more sensitive to liquidity than to fees....

We show that exchange traded funds (ETFs) are used in a new form of insider trading known as “shadow trading.” Our evidence suggests that some traders in possession of material non-public information about upcoming M&A announcements trade in ETFs that contain the target stock, rather than...