Which of the following is NOT considered a type of international trade barrier?

Investment strategies are not considered a type of international trade barrier because they refer to approaches used by businesses to allocate resources and make financial decisions in the international marketplace. These strategies involve the deployment of capital for growth and the establishment of operations across borders but do not inherently restrict trade between countries.

On the other hand, tariffs, quotas, and embargoes are direct measures that governments use to manage trade. Tariffs are taxes imposed on imported goods to increase their prices and protect domestic industries. Quotas are limits set on the quantity of a product that can be imported or exported during a specific timeframe, which directly affects the volume of trade. Embargoes are official bans on trade with certain countries or specific goods, often for political reasons, and serve to restrict trade altogether with targeted nations. Thus, investment strategies do not fall into the category of barriers affecting international trade, making it the correct answer.