Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

What's the point of a benchmark?
Yes an index is by definition any arbitrary selection. In general, to measure performance there are 2 ways: By absolute return - meaning you want a positive return at all times ie. 10% is good. -1% is bad. By relative return - this means beating the benchmark. For example, if the benchmark returns -20% and your portfolio returns -10%, then it has delivered +10% relative returns as compared to the benchmark.