計算內部報酬率-插補法 - 會計
By Frederic
at 2009-11-06T23:14
at 2009-11-06T23:14
Table of Contents
資料:
2001年.2002年.2003年的稅後現金淨流入各為510000.600000.480000
原始投資額=1080000
問題:計算內部報酬率(IRR)
解答: IRR:折現率小則折現回來折現值大.反之.折現率大折現值就小
1.用20%折現:510000*0.833+600000*0.694+480000*0.579-1080000
=39150
2.用22%折現:510000*0.82+600000*0.672+480000*0.551-1080000
=5880
3.用24%折現:510000*0.806+600000*0.65+480000*0.524-1080000
=27420
用插補法: 1085880-1080000
22%+────────*2%=22.35% IRR=23.35%
1085880-1052580
我的問題是為什麼這題的插補法是用(1085880-1080000)/(1085880-1052580)
而不是用NPV直接去計算=>(22%-X%)/(22%-24%)=(5880-0)/(5880-27420) !?
雖然解答這個答案是對的...不過我還是不太懂...請高手幫忙解個題吧!!!拜託了感恩!!!
--
2001年.2002年.2003年的稅後現金淨流入各為510000.600000.480000
原始投資額=1080000
問題:計算內部報酬率(IRR)
解答: IRR:折現率小則折現回來折現值大.反之.折現率大折現值就小
1.用20%折現:510000*0.833+600000*0.694+480000*0.579-1080000
=39150
2.用22%折現:510000*0.82+600000*0.672+480000*0.551-1080000
=5880
3.用24%折現:510000*0.806+600000*0.65+480000*0.524-1080000
=27420
用插補法: 1085880-1080000
22%+────────*2%=22.35% IRR=23.35%
1085880-1052580
我的問題是為什麼這題的插補法是用(1085880-1080000)/(1085880-1052580)
而不是用NPV直接去計算=>(22%-X%)/(22%-24%)=(5880-0)/(5880-27420) !?
雖然解答這個答案是對的...不過我還是不太懂...請高手幫忙解個題吧!!!拜託了感恩!!!
--
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