12. Health Care Select Sector SPDR Fund – XLV

Average Daily Volume: $989 million

The Health Care Select Sector SPDR Fund proved popular with traders in 2015 as many analysts predicted that the implementation of the federal Affordable Care Act would drive growth in health care. Those with a bearish view on the economy may see XLV as a safe harbor from whatever financial storms 2016 brings. This ETF had an average daily volume of 11.7 million shares a day.

11. iShares Core S&P 500 ETF – IVV

Average Daily Volume: $1 billion

SPY’s younger, smaller, less-expensive cousin, the iShares Core S&P 500 ETF, is still a behemoth at $71 billion in assets, making it the second-largest ETF in the world. On average, 4.4 million shares of IVV were traded each day in 2015.

10. iShares China Large-Cap ETF – FXI

Average Daily Volume: $1.02 billion

The iShares China Large-Cap ETF, the largest China ETF in the market, had a volatile 2015 as doubts about the health of the Chinese economy mounted. This fund was a heavy trader, with 22.8 million shares changing hands each day on average.