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<a class="el" href="namespace_quant_lib.html">QuantLib</a>::<a class="el" href="class_quant_lib_1_1_black_constant_vol.html">BlackConstantVol</a></div>
<h1>BlackConstantVol Class Reference</h1><!-- doxytag: class="QuantLib::BlackConstantVol" --><!-- doxytag: inherits="QuantLib::BlackVolatilityTermStructure" --><code>#include &lt;ql/termstructures/volatility/equityfx/blackconstantvol.hpp&gt;</code>
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Inheritance diagram for BlackConstantVol:</div>
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<p><center><img src="class_quant_lib_1_1_black_constant_vol__inherit__graph.png" border="0" usemap="#_black_constant_vol__inherit__map" alt="Inheritance graph"></center>
<map name="_black_constant_vol__inherit__map">
<area shape="rect" href="class_quant_lib_1_1_black_volatility_term_structure.html" title="Black&#45;volatility term structure." alt="" coords="5,7,205,33"></map>
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<a href="class_quant_lib_1_1_black_constant_vol-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Constant Black volatility, no time-strike dependence. 
<p>
This class implements the <a class="el" href="class_quant_lib_1_1_black_volatility_term_structure.html" title="Black-volatility term structure.">BlackVolatilityTermStructure</a> interface for a constant Black volatility (no time/strike dependence). <dl compact><dt><b>Examples: </b></dt><dd>

<p>
<a class="el" href="_convertible_bonds_8cpp-example.html#_a31">ConvertibleBonds.cpp</a>, <a class="el" href="_discrete_hedging_8cpp-example.html#_a23">DiscreteHedging.cpp</a>, <a class="el" href="_equity_option_8cpp-example.html#_a19">EquityOption.cpp</a>, and <a class="el" href="_replication_8cpp-example.html#_a11">Replication.cpp</a>.</dl><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="715f0ebaf60ac7805652ec9979aaa294"></a><!-- doxytag: member="QuantLib::BlackConstantVol::BlackConstantVol" ref="715f0ebaf60ac7805652ec9979aaa294" args="(const Date &amp;referenceDate, const Calendar &amp;, Volatility volatility, const DayCounter &amp;dayCounter)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>BlackConstantVol</b> (const <a class="el" href="class_quant_lib_1_1_date.html">Date</a> &amp;referenceDate, const <a class="el" href="class_quant_lib_1_1_calendar.html">Calendar</a> &amp;, <a class="el" href="group__types.html#gaa95ab7fe66935e3f7535413fad2a7d3">Volatility</a> volatility, const <a class="el" href="class_quant_lib_1_1_day_counter.html">DayCounter</a> &amp;dayCounter)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5d725a0fd8ce6a8ae22aa58e7c710ce6"></a><!-- doxytag: member="QuantLib::BlackConstantVol::BlackConstantVol" ref="5d725a0fd8ce6a8ae22aa58e7c710ce6" args="(const Date &amp;referenceDate, const Calendar &amp;, const Handle&lt; Quote &gt; &amp;volatility, const DayCounter &amp;dayCounter)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>BlackConstantVol</b> (const <a class="el" href="class_quant_lib_1_1_date.html">Date</a> &amp;referenceDate, const <a class="el" href="class_quant_lib_1_1_calendar.html">Calendar</a> &amp;, const <a class="el" href="class_quant_lib_1_1_handle.html">Handle</a>&lt; <a class="el" href="class_quant_lib_1_1_quote.html">Quote</a> &gt; &amp;volatility, const <a class="el" href="class_quant_lib_1_1_day_counter.html">DayCounter</a> &amp;dayCounter)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a08901216a5ae122b7c4dbb7f0f8e6f8"></a><!-- doxytag: member="QuantLib::BlackConstantVol::BlackConstantVol" ref="a08901216a5ae122b7c4dbb7f0f8e6f8" args="(Natural settlementDays, const Calendar &amp;, Volatility volatility, const DayCounter &amp;dayCounter)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>BlackConstantVol</b> (<a class="el" href="group__types.html#g7e529c39c477ba1f5a22264d93e8457a">Natural</a> settlementDays, const <a class="el" href="class_quant_lib_1_1_calendar.html">Calendar</a> &amp;, <a class="el" href="group__types.html#gaa95ab7fe66935e3f7535413fad2a7d3">Volatility</a> volatility, const <a class="el" href="class_quant_lib_1_1_day_counter.html">DayCounter</a> &amp;dayCounter)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9a7f45ffe44748a03353b5853b8b32f9"></a><!-- doxytag: member="QuantLib::BlackConstantVol::BlackConstantVol" ref="9a7f45ffe44748a03353b5853b8b32f9" args="(Natural settlementDays, const Calendar &amp;, const Handle&lt; Quote &gt; &amp;volatility, const DayCounter &amp;dayCounter)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>BlackConstantVol</b> (<a class="el" href="group__types.html#g7e529c39c477ba1f5a22264d93e8457a">Natural</a> settlementDays, const <a class="el" href="class_quant_lib_1_1_calendar.html">Calendar</a> &amp;, const <a class="el" href="class_quant_lib_1_1_handle.html">Handle</a>&lt; <a class="el" href="class_quant_lib_1_1_quote.html">Quote</a> &gt; &amp;volatility, const <a class="el" href="class_quant_lib_1_1_day_counter.html">DayCounter</a> &amp;dayCounter)</td></tr>

<tr><td colspan="2"><div class="groupHeader">BlackVolTermStructure interface</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="74d8fc5480ca811db8332b7b30597fe9"></a><!-- doxytag: member="QuantLib::BlackConstantVol::maxDate" ref="74d8fc5480ca811db8332b7b30597fe9" args="() const " -->
<a class="el" href="class_quant_lib_1_1_date.html">Date</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_black_constant_vol.html#74d8fc5480ca811db8332b7b30597fe9">maxDate</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">the latest date for which the curve can return values <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ec700319eaa1c6fca66df8e15aea6167"></a><!-- doxytag: member="QuantLib::BlackConstantVol::minStrike" ref="ec700319eaa1c6fca66df8e15aea6167" args="() const " -->
<a class="el" href="group__types.html#g4bdf4bfe76b9ffa6fa64c47d8bfa0c78">Real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_black_constant_vol.html#ec700319eaa1c6fca66df8e15aea6167">minStrike</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">the minimum strike for which the term structure can return vols <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="be69dc8630a5ea3f8333cfdfd01ba765"></a><!-- doxytag: member="QuantLib::BlackConstantVol::maxStrike" ref="be69dc8630a5ea3f8333cfdfd01ba765" args="() const " -->
<a class="el" href="group__types.html#g4bdf4bfe76b9ffa6fa64c47d8bfa0c78">Real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_black_constant_vol.html#be69dc8630a5ea3f8333cfdfd01ba765">maxStrike</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">the maximum strike for which the term structure can return vols <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Visitability</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1d7eaf2f5dccce1c7781b54d64ba4a07"></a><!-- doxytag: member="QuantLib::BlackConstantVol::accept" ref="1d7eaf2f5dccce1c7781b54d64ba4a07" args="(AcyclicVisitor &amp;)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><b>accept</b> (<a class="el" href="class_quant_lib_1_1_acyclic_visitor.html">AcyclicVisitor</a> &amp;)</td></tr>

<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="04384dcdddac572e2d556ee140adb185"></a><!-- doxytag: member="QuantLib::BlackConstantVol::blackVolImpl" ref="04384dcdddac572e2d556ee140adb185" args="(Time t, Real) const " -->
virtual <a class="el" href="group__types.html#gaa95ab7fe66935e3f7535413fad2a7d3">Volatility</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_black_constant_vol.html#04384dcdddac572e2d556ee140adb185">blackVolImpl</a> (<a class="el" href="group__types.html#g14fb8fca43a68f4168654e1f9f7e22f7">Time</a> t, <a class="el" href="group__types.html#g4bdf4bfe76b9ffa6fa64c47d8bfa0c78">Real</a>) const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Black volatility calculation. <br></td></tr>
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