|
<p><table cellspacing="0" cellpadding="0" width="331" border="0" style="WIDTH: 249pt; BORDER-COLLAPSE: collapse;"><colgroup><col width="138" style="WIDTH: 104pt; mso-width-source: userset; mso-width-alt: 5046;"></col><col width="56" style="WIDTH: 42pt; mso-width-source: userset; mso-width-alt: 2048;"></col><col width="73" style="WIDTH: 55pt; mso-width-source: userset; mso-width-alt: 2669;"></col><col width="64" style="WIDTH: 48pt;"></col></colgroup><tbody><tr height="24" style="HEIGHT: 18pt;"><td class="xl23" width="138" height="24" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 104pt; BORDER-BOTTOM: #ece9d8; HEIGHT: 18pt; BACKGROUND-COLOR: transparent;"><p><font size="4">根据如下的<span style="FONT-SIZE: 12pt;"><font face="Times New Roman">Black-Scholes</font></span>期权定价模型,权证的价值C</font></p></td><td class="xl23" width="56" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 42pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"><strong><font size="5"></font></strong></td><td width="73" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 55pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"><strong><font size="5"></font></strong></td><td width="64" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 48pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"><strong><font size="5"></font></strong></td></tr><tr height="30" style="HEIGHT: 22.5pt;"><td class="xl22" colspan="4" height="30" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 22.5pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan;">C=λ*[S*N(d<font class="font6"><sub>1</sub></font><font class="font5">)-K*N(d</font><font class="font6"><sub>2</sub></font><font class="font5">)/e</font><font class="font7"><sup>r(T-t)</sup></font><font class="font5">]</font></td></tr><tr height="30" style="HEIGHT: 22.5pt;"><td class="xl22" colspan="4" height="30" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 22.5pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan;"> d<font class="font6"><sub>1</sub></font><font class="font5"> =[ln(S</font><font class="font6"><sub>0</sub></font><font class="font5">/K)+(r+δ</font><font class="font7"><sup>2</sup></font><font class="font8">/2)</font><font class="font5">*(T-t)] / [δ*(T-t)</font><font class="font7"><sup>1/2</sup></font><font class="font8">]</font></td></tr><tr height="30" style="HEIGHT: 22.5pt;"><td class="xl22" colspan="2" height="30" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; HEIGHT: 22.5pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan;"> d<font class="font6"><sub>2</sub></font><font class="font8">=d</font><font class="font9"><sub>1</sub></font><font class="font8">-δ*(T-t)</font><font class="font10"><sup>1/2</sup></font></td><td style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td></tr></tbody></table></p><p>λ:行权比例 S:标的股票的收盘价 K:行权价 r:无风险利率</p><p><font size="2">T-t :距离到期日年数 N(d<font class="font6"><sub>1,2</sub></font><font class="font5">):标准正态分布的累积函数 δ:标的股票的历史波动率</font></font></p><p>我们可以根据一段时间的历史波动率计算出权证的价格,然后根据当天权证的收市价计算出权证的隐含波动率(实际波动率)。当权证的实际波动率较高时,如90%,表明权证的风险较高或者说高估,如果实际波动率低如30%,表明权证风险相对较低,存在低估的可能,但这都不是绝对的。诚如牛顿所云:我可以计算出地球与月球之间的引力,但无法计算出人类的贪婪。计算出其实际波动率,只是能提供一个参考。</p><p>现在的问题:"历史波动率的计算" 表格中如何实现从相应的网站上获取每天的收盘数据?</p><p>不知道我的问题说清楚了没有,要是没说清楚也没关系,大家可以留言,我来补充完整:)</p><p></p><p></p><p></p>
5hrBc70y.zip
(14.72 KB, 下载次数: 217)
<br/> |
|