What sectors has Burdin Hickok made substantial contributions to in his 20-year career?
Burdin Hickok has made substantial contributions to the fixed-income, foreign currency, and commodities sectors.
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### Instruction:
What sectors has Burdin Hickok made substantial contributions to in his 20-year career?

### Input: Not applicable

### Response:
Burdin Hickok has made substantial contributions to the fixed-income, foreign currency, and commodities sectors.<|im_end|>