Global financial services provider Barclays has witnessed reduced contributions from its commodities trading unit between January and September, Reuters reports. The firm’s nine-month income from fixed-income, currency and commodity dropped 20 percent to $8.6 billion.

Barclays saw higher income in commodities in the first quarter but heightened volatility in oil and metals in the second and third quarters resulted in the decline. Other major commodities players on Wall Street have also seen a decline in commodities income.

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