During which CDO phase does the manager reinvest cash inflows?

The correct answer is the revolving phase. During this stage, the collateralized debt obligation (CDO) manager is actively reinvesting cash inflows received from the underlying assets. This strategy is typically employed to optimize returns. The cash inflows can come from principal repayments or interest payments from the underlying securities. The manager uses these inflows to purchase additional eligible assets, thereby maintaining the portfolio's balance and seeking to enhance performance.

The revolving phase allows for flexibility in managing the CDO's assets, as it enables the infusion of new investments, which can lead to higher cash flow generation as the market moves and asset classes change over time. It is a period characterized by active management, where the focus is on maximizing yields through strategic reinvestment.

In contrast, during the ramp-up phase, the focus is on accumulating enough assets to reach the desired size of the CDO before it starts generating cash flows. In the amortization phase, the focus shifts to paying down the securities’ principal and managing existing liabilities rather than reinvesting. Finally, the final phase usually involves the liquidation of remaining assets, and there is no further reinvestment happening in this stage.