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	<title>養老保険 | nujonoa_blog</title>
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		<title>終身・養老保険の解約返戻金の利回り計算機&#124;返礼率に騙されるな！</title>
		<link>https://nujonoa.com/calculating-insurance-returns/</link>
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		<dc:creator><![CDATA[nujonoa]]></dc:creator>
		<pubDate>Thu, 12 Dec 2019 11:00:00 +0000</pubDate>
				<category><![CDATA[計算機]]></category>
		<category><![CDATA[節約]]></category>
		<category><![CDATA[FP(家庭のお金)]]></category>
		<category><![CDATA[各種データ]]></category>
		<category><![CDATA[養老保険]]></category>
		<category><![CDATA[利回り]]></category>
		<category><![CDATA[終身保険]]></category>
		<category><![CDATA[収支]]></category>
		<category><![CDATA[保険]]></category>
		<category><![CDATA[貯金額]]></category>
		<category><![CDATA[計算]]></category>
		<category><![CDATA[貯金]]></category>
		<category><![CDATA[積み立て投資]]></category>
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					<description><![CDATA[・開始する年齢と、満期日の年齢、　払い込み総額と、満期額を入力してください。 ・満期時点の解約返戻金の利回りが計算されます。 目次 終身・養老保険の解約返戻金の利回り計算機&#124;返礼率に騙されるな！複利計算の計算式についてニ [&#8230;]]]></description>
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<p>・開始する年齢と、満期日の年齢、<br>　払い込み総額と、満期額を入力してください。</p>



<p>・満期時点の解約返戻金の利回りが計算されます。</p>



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  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-2" checked><label class="toc-title" for="toc-checkbox-2">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">終身・養老保険の解約返戻金の利回り計算機|返礼率に騙されるな！</a><ol><li><a href="#toc2" tabindex="0">複利計算の計算式について</a></li><li><a href="#toc3" tabindex="0">ニュートン方程式を用いて、上記の式より利回りを計算</a></li></ol></li><li><a href="#toc4" tabindex="0">まとめ</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">終身・養老保険の解約返戻金の利回り計算機|返礼率に騙されるな！</span></h2>



<p>終身保険、養老保険の解約返戻金は、<br>「利回り」が書いていない場合が多くあります。</p>



<p>そして、金融リテラシーのない日本人は、<br>少しでもお金が増える商品であれば、これは素晴らしいと、<br>ついつい加入してしまいます。</p>



<p>きちんと利回りを確認したうえで加入しましょう！</p>



<h3 class="wp-block-heading"><span id="toc2">複利計算の計算式について</span></h3>



<p>複利計算の計算式は<br>・毎年積立額A<sub>0</sub>・利回りα・積立年数n<br>とすると、</p>



<p>満期額　＝　A<sub>0</sub>　×｛(1+α)<sup>n-1</sup>　+(1+α)<sup>n-2</sup>　+・・・+(1+α)<sup>1</sup>+1}</p>



<p>となり、等比数列であることが分かります。</p>



<p>初項が A0，公比 r，項数 n の等比数列の和は等比数列の和の公式より、</p>



<p>等比数列の和　＝　A<sub>0</sub>(1−r<sup>n</sup>)　/　(1−r)　<br>ここで、公比r＝(1+α)を代入すると</p>



<p><span class="marker-animation">満期額　＝　{ A<sub>0</sub>(1+α)<sup>n</sup>ー１ }/α</span></p>



<p>と、表すことができます。</p>



<h3 class="wp-block-heading"><span id="toc3">ニュートン方程式を用いて、上記の式より利回りを計算</span></h3>



<p>満期額　＝　{ A<sub>0</sub>(1+α)<sup>n</sup>ー１ }/α<br>より</p>



<p>f(α)　＝　A<sub>0</sub> (1+α)<sup>n</sup> ー 満期額×α　ー １ <br>(1+α)＝βとして</p>



<p>f(β)　＝　A<sub>0</sub>(β)<sup>n</sup>　ー　満期額β　＋　満期額　＋　１</p>



<p>5次元関数以降は、解の公式がないため、<br>ニュートン方程式を用いて求めています。</p>



<figure class="wp-block-image size-large"><img decoding="async" width="185" height="63" src="https://nujonoa.com/wp-content/uploads/2019/12/image-4.png" alt="" class="wp-image-3707"/></figure>



<h2 class="wp-block-heading"><span id="toc4">まとめ</span></h2>



<p>日本人は投資が嫌いな人が多いですが、保険も一つの投資です。</p>



<p>全世界の株式は、利回り「5％」以上で成長していっています。</p>



<p>本当にこの保険が自分に合っているのか、<br>一度きちんと考えて保険に加入することをお勧めします。</p>
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