We performed a screening of large-cap ETFs, defined as having Assets Under Management (AUM) above $10 billion – to determine what funds had the largest positive and negative returns on the week, according to data from etfdb.com. Only non-leveraged funds were considered.

Winners

SPDR S&P 500 ETF Trust (NYSE:SPY)

SPY added $502.21 million in net assets over the trailing week.

Launched in January 1993, SPY was the very first exchange-traded fund listed in the US. The fund seeks to provide investment results that, before expenses, correspond generally to the price and yield performance of the S&P 500 Index, a diversified large-cap U.S. index that holds companies across all eleven GICS sectors.

SPY has $401.56 billion in AUM and an expense ratio of 0.09%. The fund has holdings in 1000 companies, with the 10 largest comprising 39.34% of the fund.

The fund's largest holdings are Apple Inc. (NASDAQ:AAPL) and Microsoft Corporation (NASDAQ:MSFT) making up 7.19% and 6.51% of the fund, respectively.

SPY lost $2.62 billion in net assets YTD.

SPDR Bloomberg 1-3 Month T-Bill ETF (NYSE:BIL)

BIL was up $490.03 million in AUM on the week.

The SPDR Bloomberg 1-3 Month T-Bill ETF provides exposure to the ultrashort bond market.

The fund has $33.77 billion in AUM and an expense ratio of 0.14%.

YTD, BIL is up $7.65 billion in AUM.

Losers

iShares iBoxx $ High Yield Corporate Bond ETF (NYSE:HYG)

HYG lost $1.01 billion in net assets over the trailing week.

The iShares iBoxx $ High Yield Corporate Bond ETF offers exposure to a large swath of the dollar-denominated high-yield corporate bond market.

HYG has $12.94 billion in AUM and an expense ratio of 0.49%.

HYG has lost $3.67 billion in net assets YTD.

SPDR Gold Shares (NYSE:GLD)

GLD lost $871.39 million in net assets over the trailing week.

SPDR Gold Shares provide exposure to gold without the need to personally own bullion. The price will move synchronously with the spot price of gold.

GLD has $51.48 billion in AUM and an expense ratio of 0.40%. 

GLD lost $3.76 billion in net assets YTD.