A man with bipolar affective disorder has, for the past two weeks, been persistently and infectiously cheerful and optimistic, convinced everything in his life is going brilliantly despite recently losing his job, and has begun making a series of large, risky financial commitments as a result. What is this?

This is morbid euphoria: a sustained, pathological elevation of mood disproportionate to his actual circumstances (a recent job loss), impairing his judgement (risky financial commitments) — exactly the pattern the phenomenon's own text describes. It is not ordinary good spirits, which would not persist so disproportionately or impair judgement this significantly. It is not moria, which specifically involves excessive, inappropriate facetiousness and joking rather than this broader expansive mood and overconfidence. And it is not ecstasy, which is a more intense, trance-like or transcendent state, distinct from this sustained, functionally impairing elevated mood.