Communication services and media sector-related exchange traded funds are strengthening Friday as Netflix (NasdaqGS: NFLX) shares rallied, following the online streamer's partnership with Microsoft (NasdaqGS: MSFT) for lower-priced, ad-supported services. On Friday, the Vanguard Communication Services (VOX) rose 2.2% and the Invesco Dynamic Media ETF (PBS) increased 3.0%.