Here's How ETFs With Biggest Facebook Exposure Traded Today

A six-week old Communication Services Select Sector SPDR Fund just had its worst day ever. A rout in Facebook Inc. is to blame for that.

The exchange-traded fund that has a 22 percent exposure to Facebook, the most among peers, fell 3.8 percent Thursday -- its biggest-ever loss. State Street Corp. created the ETF ahead of S&P Global Inc.’s and MSCI Inc.’s reshuffle of their industry classifications at the end of September, which will affect internet, media and telecom stocks.