Momentum ETF Rebalances at Lucky Moment for Battered Tech Shares – Bloomberg

A big BlackRock Inc. ETF rebalance couldn’t have come at a better time for some beaten-up technology shares. Whether it can stop the bleeding is another question. 
The $17 billion iShares MSCI USA Momentum Factor exchange-traded fund (ticker MTUM) — designed to buy recent winners and dump the losers — will likely double its tech holdings to 37% during its semiannual rebalance in coming days, according to data compiled by Wells Fargo & Co.