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Katmai Co (12/09) – part (c) VAR

Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA AFM Exams › Katmai Co (12/09) – part (c) VAR

  • This topic has 5 replies, 2 voices, and was last updated 9 months ago by John Moffat.
Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • May 15, 2014 at 6:22 am #168863
    jason91
    Member
    • Topics: 13
    • Replies: 26
    • ☆

    Dear Sir,

    I seem to be having trouble grasping the VAR concept. i read some of your other posts and from what i gather is that there is no particular formula to calculate this.

    As part (c) of this question goes for 6 marks i really would like to know how they arrived at the answer. I am using the BPP revision kit.

    Kind regards

    May 16, 2014 at 5:17 am #168983
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54675
    • ☆☆☆☆☆

    All you need to learn is that at 95% confidence level, it is 1.64 standard deviations ( because 1.64 in the tables gives an answer of 0.45 (which is 0.95 – 0.5)
    At 99% confidence level it is 2.58 SD’s (because 0.99 – 0.5 = 0.49; 2.58 gives an answer of 0.49 from the tables)

    Also, you cannot add SD’s – you add the squares of them and then take the square root.

    So……if for example the monthly deviation is X and the yearly deviation is Y, then Y^2 = 12 x X^2

    ( for more explanation see the page in the revision notes on this website)

    May 17, 2014 at 8:40 am #169157
    sathjyot
    Participant
    • Topics: 16
    • Replies: 165
    • ☆☆

    Hi John,
    Do you mean that the exam questions for Var would only be with any one of the possible level?

    95% or 99%,

    Wouldn’t it be 90% 85% and so on…….

    But how we arrive this 1.64 at 95% confidence level?? I am unable to figure out.

    thanks

    May 17, 2014 at 9:10 am #169161
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54675
    • ☆☆☆☆☆

    In theory it could be any confidence level, but the only ones we ever normally look at are 95% or 99%. (But once you understand you could do it for any confidence level, however unlikely).

    First you subtract 50% from the confidence level. So at 95%, 95 – 50 = 45%
    Then you restate as a decimal/ So 45% becomes 0.45
    Then you look in the tables to see which number of standard deviations gives an answer of 0.45.

    If you look in the tables, 1.64 gives an answer of 0.4495 and 1.65 gives an answer of 1.4505.
    So the answer is actually somewhere between 1.64 and 1.65 std deviations. (1.64 is close enough for the exam)

    August 24, 2024 at 9:38 pm #710300
    affectionate63
    Participant
    • Topics: 0
    • Replies: 1
    • ☆

    Good day Sir,

    I seem to be having problem with determining standard deviation for Katmain. How do we go about getting the standard deviation as we are only given cash flow of R150m and libor of 150 basis points

    August 25, 2024 at 10:18 am #710324
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54675
    • ☆☆☆☆☆

    150 basis points (or 1.5%) is not LIBOR but is the annual volatility of LIBOR and is therefore the annual standard deviation.
    To arrive at the six-monthly standard deviation we multiply by the square root of 1/2 as explained in my free lectures on this.

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