Walmart shares tumble amid "laundering" claims
Shares of Walmart de México y Centroamérica fell by 5 percent Wednesday.
Walmex, as the company is known, has been accused once again of illegal activities, this time by two US congressmen.
The congressmen, Elijah Cummings and Henry Waxman, said they received internal documents which suggest the company is involved in tax evasion, money laundering and corruption.
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