Instead, the PGMs could be underpinned by the restarting of auto production in Japan after it was taken mostly off-line following the earthquake and tsunami earlier this year.

FORBES: METALS OUTLOOK: Gold Prices To Stabilize Next Week After Recent Break

The Tuesday tariff is yet another measure aimed at protecting local industry following sector-specific tax incentives (like the auto industry) and a more aggressive intervention policy to maintain the foreign exchange rate between the U.S. dollar and the Brazilian real at weak levels.

FORBES: Weak Economy Pushes Brazil To Protectionism