Why is OPEC cutting oil output?

Go back to Why is OPEC cutting oil output?
United States Oil Fund (NYSE: USO) Delayed: 136.69 --0 (-0%)
Previous Close $136.69    52 Week High $13.50 
Open $136.69    52 Week Low $7.67 
Day High $136.69    P/E 6.93 
Day Low $136.69    EPS $19.73 
Volume 725,128