[Cool Guy]

Driven down by capture of Osama. The probability of a terrorist act is perceived to have gone down greatly and thus the drop in prices for commodities.

I am sure some traders were privy to this news before the press release and President’s speech.

[blam]

"The probability of a terrorist act is perceived to have gone down greatly and thus the drop in prices for commodities."

I think anger over the death of OBL increases the probability of an even greater attack.

[Richbee]

You are WRONG! The drop happened in early Asian trading three to four(4) hours before President Obama called U.S. Congressional leaders and it was a non-economic event.
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READ AN AUSTRALIAN PERSPECTIVE VIA WSJ:

http://www.theaustralian.com.au/business/markets/silver-tumbles-45pc-gold-dips-as-investors-take-profits/story-e6frg91o-1226045321896