The BEST indication that risk management is effective is when risk has been reduced to...

 The best indication that risk management is effective is when risk has been reduced to meet the risk appetite of the enterprise. Risk appetite is the amount and type of risk that an enterprise is willing to accept in pursuit of its objectives. Risk appetite reflects the enterprise’s risk culture, strategy, and values, and provides a basis for setting risk tolerance levels and risk response strategies. Risk management is effective when it enables the enterprise to align its risk exposure with its risk appetite, and to optimize the risk-return trade-off. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 1, Section 1.2.1, page 181