Cash flow matching, Financial Management

Cash flow matching strategy is used to build a bond portfolio wherein the cash flows of the bond portfolio exactly match a stream of liabilities. The most simple way to build such portfolio is to buy a zero-coupon bond for each liability and maturity. However, this may not happen always as most of the bonds that are available are not zero-coupon bonds. Hence, cash flow matching strategy adopts an iterative process. That means, at each step, a bond is chosen with a maturity that matches with the last liability and an amount of principal equal to the amount of the last liability is invested in this bond. Coupon payments are made on this bond in order to reduce other (remaining) elements of liability stream. This process will continue for the next last liability, going backward in time until all liabilities have been matched by payments on the securities chosen for the portfolio. For example, let us consider a company, which has the following liabilities:

Table 1

Time

1

2

3

4

5

6

Liability

L1

L2

L3

L4

L5

L6

 

Now, let us create a dedicated cash flow matching portfolio.

Initially, select a bond 'A' with the following features:

  • Par value PA    

  • Maturity period - 6 years

  • Paying a coupon CA.

Invest some amount in Bond A in such a way that the cash flow paid at the end of maturity period (6 years). In other words (PA + CA) must be equal to L6. For the sake of simplicity, let us assume

 that a perfect match is possible, i.e.,

         PA   +  CA = L6.

The following table shows the liabilities that face out:

Table 2

Time

1

2

3

4

5

6

Liability

Cash inflows

L1

CA

L2

CA

L3

CA

L4

CA

L5

CA

L6

PA - CA

Remaining liabilities

L1 - CA

L2 - CA

L3 - CA

L4 - CA

L5 - CA

0  

 

Now, select another bond 'B' having the features we discussed above.

  • Par value PB   

  • Maturity period - 5 years

  • Paying a coupon CB.

When we invest in this bond, the cash flow paid at the end of 5 years (PB + CB) will be equal to 

L- CA.  If we consider perfect matching is possible then,

         PB + CB   + CA  = L5.

Now, the liability cash flows that are to be matched for the remaining period (4 years) will be as follows:

Table 3

Time

1

2

3

4

5

6

Liability

Cash inflows

L1

CA + CB

L2

CA + CB

L3

CA + CB

L4

CA + CB

L5

PB + CA + CB

L6

PA +CA

Remaining liabilities

L1 - CA - CB

L2 - CA - CB

L3 - CA - CB

L4 - CA - CB

0

 

0  

 

The same process must be continued with years 4, 3, 2 and 1.

Linear programming techniques can be applied to build a least-cost flow matching portfolio from an acceptable universe of bonds.

However, cash flow matching suffers from major drawbacks as follows:

  • Difficulties in perfect date matching make funds available (in general) even before the exact target date.

  • Exact amount-matching is not possible because of rounding in the bond quantities traded.

  • Finally, cash flow matching strategy has to be a rather conservative strategy that will result in an opportunity cost.

Posted Date: 9/11/2012 2:12:44 AM | Location : United States







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