US STOCKS-Wall St set to open lower as China weighs
* Chinese shares post biggest drop in eight years
* Oil prices, commodities lower following China market rout
* Teva, Allergan jump after $40.5 bln deal
* Futures down: Dow 130 pts, S&P 13 pts, Nasdaq 35 pts (Adds details, comment, updates prices)
By Tanya Agrawal
July 27 (Reuters) - Wall Street was set to begin the week in the red on Monday on concerns about China's slowing growth in the wake of the biggest drop in Shanghai shares in eight years.
Chinese shares tumbled more than 8 percent as an unprecedented government rescue plan to prop up valuations abruptly ran out of steam, raising doubts about the viability of Beijing's efforts to stave off a deeper crash.
Commodity prices resumed their downward spiral with the broader Thomson Reuters CRB commodities index hitting its lowest in six years and oil prices hitting a four-month low.
Chinese ADRs were set for a rough start with Alibaba , Baozun, Sohu.com and JD.com off between 2 percent and 5 percent. Continuación...