Check your 401(k)'s performance by reviewing your quarterly statement against a few key measures, according to the Financial Industry Regulatory Authority. At minimum, assess your investment's yield and rate of return.
Measure yield by dividing the income provided by an investment by the cost of the investment, instructs the Financial Industry Regulatory Authority. Determine the rate of return by dividing the change in the investment's value plus the income by the amount invested. These figures usually appear on the quarterly statement for your review. Ideally, your 401(k) shows steady growth over time as indicated by high yields and rates of return.