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HP 12c Owners Manual

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    							  Section 15: Savings  161 
     
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 161 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
     
    REGISTERS 
    n: # Periods.  i: Nom. Rate/n  PV: 0  PMT: Used. 
    FV: Eff. Rate 
    R0–R.9: Unused   
     
    1.  Key in the program. 
    2.  Key in the annual nominal rate as a percentage then press \. 
    3.  Key in the number of compounding periods per year then press t to 
    obtain the effective annual interest rate. 
    4.  For a new case return to step 2. 
    Example 2: 
    What is the effective annual rate of interest if the annual nominal 
    rate of 5
    1/4% is compounded monthly?
     
    Keystrokes Display  
    5.25\ 
      
    12t 
    5.38 Percent effective interest rate. 
    Effective Rate Converted to Nominal Rate   
    Given an effective interest rate and the number of compounding periods per year, 
    this routine calculates the nominal interest rate. 
    1. Press fCLEARG. 
    2.  Key in the number of periods per year then press n. 
    3.  Key in 100 then press \$. 
    4.  Key in the effective annual rate as a percentage then press +ÞM¼. 
    5. Press :n§ to obtain the annual nominal rate. 
    Example:
     Find the nominal rate if the effective annual rate is 5.35% 
    compounded quarterly. 
    Keystrokes Display  
    fCLEARG 
      
    4n100\$ 
    100.00  
    5.35+Þ 
    –105.35  
    M¼ 
    1.31  
    :n§ 
    5.25 Percent nominal interest rate.  
    						
    							162  Section 15: Savings 
     
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    Nominal Rate Converted to Continuous Effective Rate 
    This procedure converts a nominal annual interest rate to the continuous effective 
    rate. 
    1. Press 1\. 
    2.  Key in the nominal rate as a percentage then press b. 
    3. Press g>à. 
    Example:
     What is the effective rate resulting from a 5
    1/4% passbook rate with 
    continuous compounding?
     
    Keystrokes Display  
    1\5.25b 
      
    g> 
    1.05  
    à 
    5.39 Continuous rate.  
    						
    							 
    163 
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 163 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
      Section 16 
    Bonds 
    30/360 Day Basis Bonds 
    A bond is a contract to pay interest, usually semiannually, at a given rate (coupon) 
    and to pay the principal of the bond at some specified future date. A bond which 
    is calculated on a 30/360 day basis is one in which the day count basis is 
    computed using 30 days in a month and 360 days in a year. 
    The following program solves for the price given the yield or for the yield given the 
    price of a semiannual coupon bond which is calculated on a 30/360 day basis 
    and is held for more than six months. 
    KEYSTROKES DISPLAY  KEYSTROKES DISPLAY 
    fs  :6 24-  45   6 
    fCLEARÎ 00- § 25-    20  
    fCLEARG 01-  42  34:0 26-  45   0 
    g× 02-  43   7gm 27-  43  35 
    :2 03-  45   2gi39 28-43, 33   39 
    2 04-     22 29-     2 
    z 05-    10z 30-    10 
    P 06-    14¼ 31-    12 
    ?6 07-  44   6$ 32-    13 
    :5 08-  45   5Þ 33-    16  
    + 09-    40~ 34-    34 
    M 10-    15- 35-    30 
    :3 11-  45   3gF 36-  43  36 
    :4 12-  45   4~ 37-    34 
    gÒ 13-  43  26gi00 38-43, 33   00  
    						
    							164  Section 16: Bonds 
     
     
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 164 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
    KEYSTROKES DISPLAY  KEYSTROKES DISPLAY 
    d 14-    33d 39-    33 
    1 15-     1:1 40-  45   1 
    8 16-     8+ 41-    40 
    0 17-     0Þ 42-    16 
    z 18-    10$ 43-    13 
    n 19-    11¼ 44-    12 
    gT 20-  43  242 45-     2 
    1 21-     1§ 46-    20 
    ~ 22-    34fs  
    - 23-    30  
     
    REGISTERS 
    n: 
    ∆ days/180  i: Yield/2  PV: Price  PMT: Coupon/2. 
    FV: Red+Cpn./2 
    R0: Yield  R1: Price.  R2: Coupon 
    R3: Dset R4: Dmat R5: Redemption  R6: Coupon/2. 
    R7–R.3: Unused    
     
    1.  Key in the program. 
    2. If the C status indicator is not displayed, press ?É. 
    3.  Key in the annual coupon interest rate as a percentage then press ?2. 
    4.  Key in the settlement date (MM.DDYYYY)
    * then press ?3. 
    5.  Key in the maturity date (MM.DDYYYY)* then press ?4. 
    6.  Key in the redemption value as a percentage of par then press ?5. 
    7.  If price is desired: 
    a.  Key in the desired yield to maturity as a percentage then press ?0. 
    b. Press t to calculate price as a percentage of par value. 
    c. Press ~ to display accrued interest due the seller. 
                                                     
    *  For information about date format see pages 29 to 30.    
    						
    							  Section 16: Bonds  165 
     
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 165 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
    For a new case return to step 3. Note that only those values which have been 
    changed need to be reentered and stored. 
    8.  If yield is desired: 
    a.   Press 0?0. 
    b.    Key in the price as a percentage of par value and press ?1. 
    c.   Press t to compute annual yield to maturity. 
    For a new case return to step 3. Note that only those values which have 
    been changed need to be reentered and stored. 
    Example 1:
     What price should you pay on August 28, 2004 for a 5
    1/2% bond 
    (computed with a 30/360 basis) that matures on June 1, 2008, if you want a 
    yield of 7
    3/4%?
     What price should you pay for a yield of 8%?
     This problem 
    assumes a redemption value of 100. 
    Keystrokes Display  
    ?Æ 
     Set compound interest mode if the C
     
    indicator is not on. 
    5.5?2 
    5.50 Coupon into register 2. 
    8.282004?3 
    8.28 Settlement date into register 3. 
    6.012008?4 
    6.01 Maturity date into register 4. 
    100?5 
    100.00 Redemption value into register 5. 
    7.75?0 
    7.75 Yield into register 0.   
    t 
    92.77 Price (calculated). 
    ~ 
    1.33 Accrued interest (calculated). 
    8?0 
    8.00 New yield into register 0. 
    t 
    92.01 Price to yield 8% (calculated). 
    ~ 
    1.33 Accrued interest (calculated). 
    + 
    93.34 Total price paid. 
    Example 2: 
    The market is quoting 93
    3/8% for the bond described in example 1. 
    What yield will that provide?
     What would be the yield to maturity if 92% were the 
    quoted price?
     
    Keystrokes Display  
     
    93.34 From previous example. 
    0?0 
      
    3\8z 
      
    93+?1t 
    7.55 Yield at 933/8% (calculated). 
    92?1t 
    8.00 Yield at 92% (calculated).  
    						
    							166  Section 16: Bonds 
     
     
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    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
    Annual Coupon Bonds 
    For bonds which have annual coupons, use the following hp 12c program to 
    evaluate price and accrued interest on an Actual/Actual day basis. This program 
    may be modified for annual coupon bonds to be calculated on a 30/360 day 
    basis. 
    KEYSTROKES DISPLAY  KEYSTROKES DISPLAY 
    fs  gÒ 19-  43  26 
    fCLEARÎ 00- ?7 20-  44   7 
    fCLEARG 01-  42  34:6 21-  45   6 
    g 02-  43   8:4 22-  45   4 
    :0 03-  45   0gÒ 23-  43  26 
    n 04-    11:7 24-  45   7 
    :2 05-  45   2z 25-    10 
    P 06-    14n 26-    11 
    :1 07-  45   10 27-     0 
    ¼ 08-    12P 28-    14 
    :3 09-  45   3M 29-    15 
    M 10-    15Þ 30-    16 
    $ 11-    13:n 31-  45  11 
    :5 12-  45   5:2 32-  45   2 
    Æ 13-    26Þ 33-    16 
    6 14-     6§ 34-    20 
    Þ 15-    16t 35-    31 
    - 16-    30- 36-    30 
    ?6 17-  44   6fs  
    :5 18-  45   5  
      
    						
    							  Section 16: Bonds  167 
     
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 167 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
    REGISTERS 
    n: Used  i: Yield  PV: Used  PMT: Cpn. or 0 
    FV: Used 
    R0: # Periods (n)  R1: Yield  R2: Coupon 
    R3: Redemption  R4: Settlement  R5: Next Cpn.  R6: Last Coupon 
    R7: Used  R8–R.5: Unused   
    For annual coupon bonds calculated on a 30/360 day basis, insert d
     after 
    gÒ
     at steps 19 and 23 (making the program two steps longer). 
    1.  Key in the program and press ?É if the C status indicator is not 
    displayed. 
    2.  Key in the total number of coupons which are received and press ?0. 
    3.  Key in the annual yield as a percentage then press ?1. 
    4.  Key in the amount of the annual coupon then press ?2.
    * 
    5.  Key in the redemption value then press ?3.
    * 
    6.  Key in the settlement (purchase) date
    † then press ?4. 
    7.  Key in the date of the next coupon then press ?5. 
    8. Press t to obtain the amount of accrued interest. 
    9. Press t to determine the priceof the bond. 
    10. For a new case, return to step 2. 
    Example:
     What is the price and accrued interest of a 20-year Eurobond with 
    annual coupons of 6.5% purchased on August 15, 2004 to yield 7%. The next 
    coupon is received on December 1, 2004. 
    Keystrokes Display  
    ?Æ 
     Set compound interest mode if the C
     
    indicator is not on. 
    20?0 
    20.00 Total number of coupons. 
    7?1 
    7.00 Annual yield. 
    6.5?2 
    6.50 Annual coupon rate. 
    100?3 
    100.00 Redemption value. 
    8.152004?4 
    8.15 Settlement date. 
    12.012004?5 
    12.01 Next coupon date. 
    t 
    –4.58 Accrued interest. 
    t 
    –94.75 Purchase price. 
                                                     
    *  Positive for cash received; negative for cash paid out. 
    †  For information about date format see pages 29 to 30.  
    						
    							 
     
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 169 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
     
     
     
     
     
     
     
     
     
    Appendixes  
    						
    							 
    170 
    File name: hp 12c_users guide_English_HDPMBF12E44  Page: 170 of 209   
    Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
      Appendix A 
    The Automatic Memory Stack 
    Four special registers in the hp 12c are used for storing 
    numbers durin
    g calculations. To understand how these 
    re
    gisters are used, they should be visualized as stacked on 
    top of each other.   
     
    (For this reason, they are 
    generally referred to as the “stack registers” or 
    collectively as “the stack.”) The stack registers are designated X, Y, Z, and T. 
    Unless the calculator is in Program mode, the number shown in the display is the 
    number in the X-register (modified according to the current display format). 
    The number in the X-register — and, for two-number functions, the number in the 
    Y-register — are the number(s) used in calculations. The Z- and T-registers are used 
    primarily for the automatic retention of intermediate results during chain 
    calculations, as described in section 1. 
    Before we discuss the details of the stack operation, let’s take a quick look at how 
    the stack is used in a simple arithmetic calculation and in a chain calculation. For 
    each key pressed in the keystroke sequence, the diagram illustrating the 
    calculation shows, above the key, the numbers in each of the stack registers after 
    that key is pressed. 
    First, let’s consider the calculation of 5 – 2: 
     
    The diagram shows why we said in section 1 that the \ 
    key separates the 
    second number entered from the first number entered. Note also that this positions 
    the 5 in the Y-register above the 2 in the X-register — just like they would be 
    positioned if you wrote the calculation vertically on paper: 
      
    						
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