A fundamentally important task for treasurers is to tát oversee the organisation’s cash flow and shorter-term investments.
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To tự this successfully, the treasurer must:
- Understand the cash flows from investments; and
- Be able to tát compare different investment products consistently.
FIRST THINGS FIRST
Essential considerations for short-term investment are safety, liquidity and yield, in that order. Once safety (or ‘security’) and liquidity are satisfied,we can move on to tát compare yields.
This article focuses on calculating and applying yields. These are essential foundations for making valid comparisons.
Say we invest 3,000,000 units of our local currency for a 90-day period, expecting to tát get back 3,030,000 at the kết thúc. The gain, surplus or interest is the difference between the amount at the kết thúc and the amount at the start.
In this case it will be 3,030,000 – 3,000,000 = 30,000.
To make returns comparable, gains are generally expressed as a percentage interest rate, also known as ‘yield’.
The gain of 30,000 on the starting amount of 3,000,000 represents a yield (r) of:
(r) = Gain / Starting amount
= 30,000 / 3,000,000 = 0.01 (= 1%)
This is the yield per 90-day period. It is the ‘periodic yield’ for 90 days.
If the periodic yield were greater, for example, 1.02% for the same 90-day period, the interest or gain for the 90-day period would be correspondingly greater.
It would become:
3,000,000 x 0.0102 = 30,600.
For the same length of period, a greater periodic yield indicates a better giảm giá khuyến mãi, all other things being equal.
WHERE'S THE CATCH
But all other things are hardly ever equal in an efficient market. This is usefully expressed in the phrase ‘There’s no such thing as a không lấy phí lunch’.
‘No không lấy phí lunch’ means, if it looks lượt thích we’re getting an extra 0.02% for không lấy phí, we won’t be. We will be paying for it in some way. There will
always be some catch or disadvantage.
Keeping that health warning in mind, let’s continue calculating with yields.
In wholesale markets, yields are normally expressed as nominal, or quoted, yields (R) per conventional year, rather phàn nàn periodic yields (r).
Short-term yields are normally quoted on a ‘simple’ basis, per conventional year of 360 or 365 days. To convert between quotes and periodic yields, we simply multiply or divide the rates by an appropriate fraction.
THREE MILLION DOLLARS
Let’s apply this simple multiplication technique to tát calculate interest for a short-term period, based on a quoted rate for short-term US dollars, which uses a 360-day year.
For example, you deposit $3m for 90 days at a quoted interest rate of 4%, based on a 360-day conventional year. Let's calculate the amount of interest you will enjoy.
DO THE TWO-STEP
We’ll work through this problem in two steps:
(1) Adjust the quoted interest rate to tát get the periodic yield.
(2) Calculate the interest from the periodic yield.
(1) Periodic yield (r) from quoted rate (R)
r = R x days / year
R = quoted yield per conventional year = 0.04 (= 4%)
days = number of days in the investment period = 90
year = number of days in a conventional year = 360 for
US dollars here
r = 0.04 x 90 / 360
= 0.01 per 90 days
(2) Interest from periodic yield
Interest = start amount x periodic yield
= $3,000,000 x 0.01
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MORE DAYS IN A YEAR
Our calculation of $30,000 of interest for short-term US dollars used a 360-day year. Some other currencies and markets, for example, short-term sterling (£), use a 365-day conventional year.
Let’s apply a 365-day year for £ now.
For example, Your organisation has an opportunity to tát invest £3m in a Certificate of Deposit (CD). Calculate the redemption value for such a CD which matures in 90 days, quoted in the market at a yield of 4%.
‘Redemption value’ for a CD means the total cash we will receive back at the final maturity, in 90 days’ time.
ONE, TWO, THREE
For this example we need three steps. The first two are the same as before:
(1) Calculate the periodic yield.
(2) Calculate the interest from periodic yield, as before.
(3) Finally, add the interest to tát the start amount, to tát calculate the redemption value.
(1) Periodic yield
r = R x days / year
R = quoted yield = 0.04
days = days in investment period = 90
year = days in conventional year = 365 for £ this time
r = 0.04 x 90 / 365
= 0.009863 per 90 days (rounded to tát the nearest 0.0001%)
Interest = start amount x periodic yield
= £3,000,000 x 0.009863
(3) Redemption value = kết thúc amount
End amount = start amount + interest
= 3,000,000 + 29,589
DIFFERENT CONVENTIONS, LESS INTEREST
When we invested £3m at 4% for 90 days, we got back £29,589 of interest. Do you remember when we invested $3m at 4% for the same period, we got a bigger number for our interest, of $30,000?
This difference results from short-term £ using a 365-day conventional year to tát calculate interest, compared with 360 days for US dollars. These quoting conventions are sometimes known as ACT/365 fixed and ACT/360, respectively. ‘ACT’ refers to tát the ‘actual’ number of days in the investment period.
We’ve seen that returns from fixed-rate short-term investments depend on several factors, including:
- Headline percentage rates;
- Quoting conventions;
- Amount invested; and
Only when all of these variables, and others, are properly quantified and factored in, can we make properly informed comparisons and recommendations.
Author: Doug Williamson
Source: The Treasurer magazine
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