• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
Free ACCA & CIMA online courses from OpenTuition

Free ACCA & CIMA online courses from OpenTuition

Free Notes, Lectures, Tests and Forums for ACCA and CIMA exams

  • ACCA
  • CIMA
  • FIA
  • OBU
  • Books
  • Forums
  • Ask AI
  • Search
  • Register
  • Login
  • ACCA Forums
  • Ask ACCA Tutor
  • CIMA Forums
  • Ask CIMA Tutor
  • FIA
  • OBU
  • Buy/Sell Books
  • All Forums
  • Latest Topics

20% off ACCA & CIMA Books

OpenTuition recommends the new interactive BPP books for September 2025 exams.
Get your discount code >>

Delta : Marengo (12/10)

Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA AFM Exams › Delta : Marengo (12/10)

  • This topic has 6 replies, 4 voices, and was last updated 11 years ago by John Moffat.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • May 25, 2014 at 12:52 pm #170666
    bilalayaz786
    Member
    • Topics: 5
    • Replies: 1
    • ☆

    First of all THANKS is advance John for the great work you are doing here.

    I am struggling here with deltas N(d1) and N(d2) in the question Marengo. According to the normal calculations we calculate d1 according to the formula and look up the corresponding figures using the tables. If d1 is greater than 0, we add 0.5 and vice versa.

    The problem is I can’t figure out what the examiner has done here…

    N(d1)=0.5+0.2291+0.7x (0.234 – 0.2291) = 0.7134

    N(d2)=0.5+0.0753+0.3x (0.0793 – 0.0753) = 0.5765

    This procedure has been done in a number of other questions as well but I can’t figure it. Maybe its something to do with the tables as I am only looking up to two decimal places i.e instead of 0.617 only looking up 0.61.

    Plus I would appreciate if you can recommend me some readings for deltas and delta hedges as I can’t find something in detail in bpp or kaplan.

    May 25, 2014 at 1:28 pm #170686
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54699
    • ☆☆☆☆☆

    All he has done is approximated between the results from the tables.

    I don’t think that the figures you have quoted come from Marengo!

    Using Marengo however as an example, we want to look up 0.055 in the tables. However we can only look up 0.05 and 0.06, so what he has done is taken the figure for 0.05 (0.0199) and then added 0.5 of the difference between 0.05 and 0.06 from the tables (0.0199 and 0.0239). In that way he has approximated to 0.055.

    With regard to deltas and delta hedges, I am surprised if BPP and Kaplan have no detail. Have you read our Course Notes (and watched the free lecture that goes with them)?

    May 31, 2014 at 3:53 am #172044
    peilin
    Member
    • Topics: 8
    • Replies: 19
    • ☆

    Hi John,

    I don’t understand why N(-d1) is plus with 0.5, shouldn’t it be (0.5-(0.0199+(0.0239-0.0199)/2)?

    And in BPP text, with the option to abandon, given the d1 is 1.6424 and N(d1) is 0.9495, the N(-d1) is calculated this way “1-0.9495 = 0.0505”. My question would be why using 1 not 0.5?

    Many thanks!

    May 31, 2014 at 11:49 am #172102
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54699
    • ☆☆☆☆☆

    D1 is negative, and therefore -D1 is positive (minus a negative number is a positive number).

    The question tells you to use N(-D1)

    I do not have BPP books and so I cannot really help with your second question without seeing the question itself.

    May 31, 2014 at 12:46 pm #172112
    peilin
    Member
    • Topics: 8
    • Replies: 19
    • ☆

    Thanks John! 🙂

    May 31, 2014 at 4:35 pm #172146
    atiba03
    Member
    • Topics: 2
    • Replies: 2
    • ☆

    Hi John,
    I have been working out Marengo from the ACCA Dec 2010 Past Questions and Answers. I expect that the value of d1 should be -0.149 instead of 0.55.
    It appears the formula used in the solving the problem was wrong. ACCA used

    d1 = [ln(Pa/Pe) + (r + 0·5s^2)t]/(st^1/2)

    Instead of using

    d1 = [ln(Pa/Pe) + (r +( 0·5s^2)t]/(st^1/2)

    Please could you confirm if i am right?

    May 31, 2014 at 5:52 pm #172179
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54699
    • ☆☆☆☆☆

    The examiner has used the formula correctly in his answer, and -0.055 is correct (not 0.55 as you have typed.

    (And I cannot see any difference between the two formulae that you have typed!)

  • Author
    Posts
Viewing 7 posts - 1 through 7 (of 7 total)
  • You must be logged in to reply to this topic.
Log In

Primary Sidebar

Donate
If you have benefited from our materials, please donate

ACCA News:

ACCA My Exam Performance for non-variant

Applied Skills exams is available NOW

ACCA Options:  “Read the Mind of the Marker” articles

Subscribe to ACCA’s Student Accountant Direct

ACCA CBE 2025 Exams

How was your exam, and what was the exam result?

BT CBE exam was.. | MA CBE exam was..
FA CBE exam was.. | LW CBE exam was..

Donate

If you have benefited from OpenTuition please donate.

PQ Magazine

Latest Comments

  • Ken Garrett on The Finance Function in the Digital Age – CIMA E1
  • DeborahProspect on ACCA SBR Specimen Exam 2 Question 1
  • darshan.69 on Chapter 9 Pension Schemes TX-UK FA2023
  • darshan.69 on Chapter 9 Pension Schemes TX-UK FA2023
  • Jarzin on The Finance Function in the Digital Age – CIMA E1

Copyright © 2025 · Support · Contact · Advertising · OpenLicense · About · Sitemap · Comments · Log in