# How to create an Efficient Frontier graph with one constant asset at 5% of the portfolio and two other assets fluctuate between remaining allocation?

Creating an Efficient Frontier graph with Stocks and Bonds over a 0%/100%, 10%/90%, 20/80%, ..., 100%/0% allocation works and results in an expected Efficient Frontier graph, like the following:

However, how can I add an additional asset that remains at a constant allocation throughout all other calculations? The calculation would be of the form 5%/0%/95%, 5%/10%/85%, 5%/20/75%, ..., 5%/95%/0%.

Is this a common problem to solve? If so, is there a general name for it? If not, am I not understanding how this graph works? Is the following the type of graph that I am looking for?

• I am interested in looking at this and doing some calculations. Can you tell me your assumptions about the returns of the three assets and the covariances. – Alex C May 26 at 23:32