Saving money on health care can be a challenge. But weâre here to help. There are a number of ways to reduce your out-of-pocket costs. For example, choose an in-network doctor or hospital instead of one thatâs out of network. Another good way to save is to choose a plan that is compatible with a tax-advantaged health savings account. Explore more ways to save.
Time-weighted return. Related Articles. Time-weighted returns is a measure of the compound rate of return of a portfolio over a stated period of time. It requires a set of sub-period returns to be calculated whenever there is an external cash flow, such as a deposit or withdrawal from the portfolio.
1. Divide the amount of the substance at one point in time by the amount remaining after a period of time. 1  The formula for calculating half life is as follows: t1/2 = t * ln(2)/ln(N0/Nt). 2  In this formula, t = time gone by, N 0 = amount of substance at the beginning, and N t = amount of substance after a period of time.