"through trading" is correct and usable in written English.
You can use it to refer to the buying and selling of goods or securities. For example: "The company increased its profits through trading of commodities."
Their returns are reduced through trading.
Governance Through Trading and Intervention: a Theory of Multiple Blockholders.
They also spread Islam southward along the east coast, largely through trading and kinship relationships.
Still, the steep market declines on Wednesday underscored the fears circulating through trading desks.
Hook's team wanders through, trading puns and trying to think of rhymes for "borscht".
They then sold the certificates through trading accounts registered in Denmark and Britain.
The Ami have undergone pronounced acculturation, primarily through trading contacts with the Chinese.
After combing through trading records all day Saturday, the executives discovered the extent of the fraud.
For years they kept a hungry eye on China, maintaining contact through trading and border wars.
from engaging in schemes to exploit their structural informational advantage through trading in affected securities". Post, at 251.
In Victoria, Australia, most groundwater resources are now fully allocated and opportunities for new groundwater development can only occur through trading of license entitlements.
