在asset allocation基础班讲义第90页，课上讲到对于high volatility的asset class，应该设定一个tight range，原因是需要频繁调整仓位。但在协会reading17 补充题的第二题中的答案，明确提到了higher risk asset should have a wider corridor to avoid frequent,costly rebalancing. 请问high volatility和high risk是等同的吗，还是说需要分开单独记忆？
