Loans and Mortgages

Simple Annual Interest

Example. <RXU￿JRRG￿IULHQG￿QHHGV￿D￿ORDQ￿WR￿VWDUW￿KLV￿ODWHVW￿HQWHUSULVH￿DQG￿ KDV￿DVNHG￿\RX￿WR￿OHQG￿KLP￿￿￿￿￿￿IRU￿￿￿￿GD\V￿￿<RX￿OHQG￿KLP￿WKH￿PRQH\￿DW￿

￿￿￿￿VLPSOH￿DQQXDO￿LQWHUHVW￿￿WR￿EH￿FDOFXODWHG￿RQ￿D￿￿￿￿￿GD\￿EDVLV￿￿+RZ￿ PXFK￿LQWHUHVW￿ZLOO￿KH￿RZH￿\RX￿LQ￿￿￿￿GD\V￿￿DQG￿ZKDW￿LV￿WKH￿WRWDO￿DPRXQW￿ RZHG"

7KLV￿HTXDWLRQ￿LV￿XVHG￿IRU￿FDOFXODWLQJ￿VLPSOH￿DQQXDO￿LQWHUHVW￿XVLQJ￿D￿￿￿￿￿GD\￿\HDU￿,17(5(67￿
/2$1￿$02817,17(5(67￿ 7(50￿2)￿/2$1￿￿,1￿'$<6￿

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￿￿￿

Keys:

 

Display:

Description:

￿￿￿￿"￿￿￿

0.10

6WRUHV￿LQWHUHVW￿
"￿￿d￿￿￿￿

 

7.40

&DOFXODWHV￿LQWHUHVW￿RZHG￿

￿a￿

 

457.40

&DOFXODWHV￿WRWDO￿RZHG￿

Continuous Compounding

7KH￿HTXDWLRQ￿IRU￿FDOFXODWLQJ￿DQ￿HIIHFWLYH￿UDWH￿IRU￿FRQWLQXRXV￿ FRPSRXQGLQJ￿LV￿

())￿ = (H(120￿ ￿￿￿) ￿) ⋅ ￿￿￿

7R￿VROYH￿D￿FRQWLQXRXV￿FRPSRXQGLQJ￿SUREOHP￿FRPSOHWH￿WKHVH￿VWHSV￿￿￿&RPSXWH￿WKH￿DQQXDO￿HIIHFWLYH￿UDWH￿XVLQJ￿WKH￿DERYH￿HTXDWLRQ￿

￿￿(LWKHU￿XVH￿WKLV￿HIIHFWLYH￿UDWH￿LQ￿\RXU￿FDOFXODWLRQV￿ZLWK￿DQ￿DQQXDO￿ SHULRG￿￿3￿<5￿ ￿￿￿￿RU￿FRQYHUW￿WKLV￿UDWH￿VR￿WKDW￿LW￿DSSOLHV￿WR￿\RXU￿ SD\PHQW￿SHULRG￿￿,Q￿WKH￿IROORZLQJ￿H[DPSOH￿￿3￿<5￿ ￿￿￿￿VR￿\RX￿KDYH￿ WR￿FDOFXODWH￿D￿QHZ￿120￿￿XVLQJ￿WKH￿LQWHUHVW￿UDWH￿FRQYHUVLRQ￿ DSSOLFDWLRQ￿ZLWK￿3￿<5￿HTXDO￿WR￿￿￿￿

98 8: Additional Examples