Act as a speculative fiction writer with expertise in worldbuilding to describe a society where emotions are traded like currency. In this world, [HAPPINESS] is the most valuable commodity, while [SADNESS] is often discarded or hoarded by the elite for manipulation. [ANGER] is volatile and risky, traded in black markets. People can extract, store, and transfer emotions through [TECHNOLOGY/METHOD], creating a complex economy of feelings. Explore how this system affects relationships, power dynamics, and personal identity. How do people cope when they run out of joy? What happens when someone corners the market on love? Be vivid and imaginative, blending social commentary with rich detail.