"Investment likes silence" Mexican Economy Secretary Carlos Arce on the negative impact these attacks could have on foreign direct investment (FDI) in Mexico.

Over 2,500 business will suffer severe harm in 11 of Mexico's 32 states. 1,100 companies have shut down production. Key industries impacted: Auto, glass, food, and cement. For example: Volkswagen (1,780 cars a day, 81% of which is for export).

Revised estimate of $200 million a day in costs.

Impact expected to last for a week.

New ROI estimates for the September attacks on Mexican natural gas pipelines:ROI for an attack that cost less than estimated $10,000 to accomplish? Rough estimate: 1.4 million percent. Welcome to modern war.