我目前正在开展一个项目,可以帮助我为给定的股票创建隐含的波动率表面。为此,我正在编写一个脚本,将下载此特定股票的所有可用选项 - 从我收集的内容中,可以通过使用批量字段/覆盖通过Bloomberg API发送请求来实现。这是我目前的代码:
d_host = "localhost";
d_port = 8194;
SessionOptions sessionOptions;
sessionOptions.setServerHost(d_host.c_str());
sessionOptions.setServerPort(d_port);
Session session(sessionOptions);
Service refDataService = session.getService("//blp/refdata");
Request request = refDataService.createRequest("ReferenceDataRequest");
request.append("securities", "MSFT US EQUITY");
request.append("fields", "CHAIN_TICKERS");
// add overrides
Element overrides = request.getElement("overrides");
Element override1 = overrides.appendElement();
override1.setElement("fieldId", "CHAIN_PUT_CALL_TYPE_OVRD");
override1.setElement("value", "C");
Element override2 = overrides.appendElement();
override2.setElement("fieldId", "CHAIN_POINTS_OVRD");
override2.setElement("value", 100);
Element override3 = overrides.appendElement();
override3.setElement("fieldId", "CHAIN_EXP_DT_OVRD");
override3.setElement("value", "20250203");
std::cout << "Sending Request: " << request << std::endl;
CorrelationId cid(this);
session.sendRequest(request, cid);
(followed by event handling)
现在我有几个问题/问题:
代码编译没有问题,但在Bloomberg终端上运行时,会打印以下错误: 我该如何解决这个问题呢?我假设我在覆盖字段的某个地方犯了一个错误..
我需要调整代码以下载特定成熟度下的所有可用选项,即我希望获得所有选项的列表,直到今天+ 15年。
我如何下载每个选项的隐含波动率?我是否需要将代码存储在一个数组中,然后发送一个字段请求&#34; IVOL_MID&#34;对于每个选项还是有某种方法可以立即获得所有波动率?
编辑:这是我的事件处理程序的代码,因为这似乎是问题所在。
session.sendRequest(request, cid);
while (true)
{
Event event = session.nextEvent();
MessageIterator msgIter(event);
while (msgIter.next()) {
Message msg = msgIter.message();
if (msg.correlationId() == cid) {
processMessage(msg);
}
}
if (event.eventType() == Event::RESPONSE) {
break;
}
}
void processMessage(Message &msg)
{
Element securityDataArray = msg.getElement(SECURITY_DATA);
int numSecurities = securityDataArray.numValues();
for (int i = 0; i < numSecurities; ++i) {
Element securityData = securityDataArray.getValueAsElement(i);
std::cout << securityData.getElementAsString(SECURITY)
<< std::endl;
const Element fieldData = securityData.getElement(FIELD_DATA);
for (size_t j = 0; j < fieldData.numElements(); ++j) {
Element field = fieldData.getElement(j);
if (!field.isValid()) {
std::cout << field.name() << " is NULL." << std::endl;
}
else {
std::cout << field.name() << " = "
<< field.getValueAsString() << std::endl;
}
}
Element fieldExceptionArray =
securityData.getElement(FIELD_EXCEPTIONS);
for (size_t k = 0; k < fieldExceptionArray.numValues(); ++k) {
Element fieldException =
fieldExceptionArray.getValueAsElement(k);
std::cout <<
fieldException.getElement(ERROR_INFO).getElementAsString(
"category")
<< ": " << fieldException.getElementAsString(FIELD_ID);
}
std::cout << std::endl;
}
答案 0 :(得分:2)
问题在于您未显示的事件处理代码。你可能错误地解析它。
运行查询我得到以下结果:
MSFT US 01/20/17 C23
MSFT US 01/20/17 C25
MSFT US 01/20/17 C30
MSFT US 01/20/17 C33
MSFT US 01/20/17 C35
MSFT US 01/20/17 C38
MSFT US 01/20/17 C40
MSFT US 01/20/17 C43
MSFT US 01/20/17 C45
MSFT US 01/20/17 C47
MSFT US 01/20/17 C50
MSFT US 01/20/17 C52.5
MSFT US 01/20/17 C55
MSFT US 01/20/17 C57.5
MSFT US 01/20/17 C60
MSFT US 01/20/17 C65
MSFT US 01/20/17 C70
注意:我使用的是Java API,但它基本相同。
更新:
您的代码无法正确解析字段数据数组元素:返回的数据包含一系列序列,因此您需要分两步解析它。而不是field.getValueAsString()
,你应该有一个看起来像这样的代码(它是用Java编写的,没有经过测试):
//...
for (int i = 0; i < field.numValues(); i++) {
Element sequence = field.getValueAsElement(i);
ElementIterator it = sequence.elementIterator();
while (it.hasNext()) {
Element e = it.next();
System.out.println(e.getValueAsString());
}
如果这不起作用,我建议您逐步调试代码并检查您收到的数据类型并相应地处理它。
有关详细信息,请阅读Developer's guide,特别是A.2.3。
答案 1 :(得分:1)
正如在另一个答案中所看到的,问题在于事件处理,所以我使用Bloomberg API emulator中的一些示例重写了该部分。
session.sendRequest(request, cid);
bool continueToLoop = true;
while (continueToLoop)
{
Event evt = session.nextEvent();
switch (evt.eventType())
{
case Event::RESPONSE:
continueToLoop = false; //fall through
case Event::PARTIAL_RESPONSE:
ProcessReferenceDataEvent(evt);
break;
}
}
void ProcessReferenceDataEvent(Event evt)
{
const string level1 = "";
const string level2 = "\t";
const string level3 = "\t\t";
const string level4 = "\t\t\t";
std::cout << endl << endl;
std::cout << level1 << "EventType = " << evt.eventType();
MessageIterator iter(evt);
while (iter.next())
{
Message msg = iter.message();
std::cout << endl << endl;
std::cout << level1 << "correlationID = " << msg.correlationId().asInteger() << endl;
std::cout << level1 << "messageType = " << msg.messageType().string() << endl;
std::cout << endl << endl;
Element SecurityDataArray = msg.getElement(SECURITY_DATA);
int numSecurities = SecurityDataArray.numValues();
for (int valueIndex = 0; valueIndex < numSecurities; valueIndex++)
{
Element SecurityData = SecurityDataArray.getValueAsElement(valueIndex);
string Security = SecurityData.getElementAsString(SECURITY);
std::cout << level2 << Security << endl;
bool hasFieldErrors = SecurityData.hasElement("fieldExceptions", true);
if (hasFieldErrors)
{
Element FieldErrors = SecurityData.getElement(FIELD_EXCEPTIONS);
for (size_t errorIndex = 0; errorIndex < FieldErrors.numValues(); errorIndex++)
{
Element fieldError = FieldErrors.getValueAsElement(errorIndex);
string fieldId = fieldError.getElementAsString(FIELD_ID);
Element errorInfo = fieldError.getElement(ERROR_INFO);
string source = errorInfo.getElementAsString("source");
int code = errorInfo.getElementAsInt32("code");
string category = errorInfo.getElementAsString("category");
string strMessage = errorInfo.getElementAsString("message");
string subCategory = errorInfo.getElementAsString("subcategory");
cerr << level3 << "field error:" << endl;
cerr << level4 << "fieldId = " << fieldId << endl;
cerr << level4 << "source = " << source << endl;
cerr << level4 << "code = " << code << endl;
cerr << level4 << "category = " << category << endl;
cerr << level4 << "errorMessage = " << strMessage << endl;
cerr << level4 << "subCategory = " << subCategory << endl;
}
}
bool isSecurityError = SecurityData.hasElement("securityError", true);
if (isSecurityError)
{
Element secError = SecurityData.getElement("securityError");
string source = secError.getElementAsString("source");
int code = secError.getElementAsInt32("code");
string category = secError.getElementAsString("category");
string errorMessage = secError.getElementAsString("message");
string subCategory = secError.getElementAsString("subcategory");
cerr << level3 << "security error:" << endl;
cerr << level4 << "source = " << source << endl;
cerr << level4 << "code = " << code << endl;
cerr << level4 << "category = " << category << endl;
cerr << level4 << "errorMessage = " << errorMessage << endl;
cerr << level4 << "subCategory = " << subCategory << endl;
}
else
{
Element FieldData = SecurityData.getElement(FIELD_DATA);
double pxLast = FieldData.getElementAsFloat64("PX_LAST");
double bid = FieldData.getElementAsFloat64("BID");
double ask = FieldData.getElementAsFloat64("ASK");
string ticker = FieldData.getElementAsString("TICKER");
std::cout << level3 << "fields: " << endl;
std::cout << level4 << "PX_LAST = " << pxLast << endl;
std::cout << level4 << "BID = " << bid << endl;
std::cout << level4 << "ASK = " << ask << endl;
std::cout << level4 << "TICKER = " << ticker << endl;
bool excludeNullElements = true;
if (FieldData.hasElement("CHAIN_TICKERS", excludeNullElements))
{
Element chainTickers = FieldData.getElement("CHAIN_TICKERS");
for (size_t chainTickerValueIndex = 0; chainTickerValueIndex < chainTickers.numValues(); chainTickerValueIndex++)
{
Element chainTicker = chainTickers.getValueAsElement(chainTickerValueIndex);
string strChainTicker = chainTicker.getElementAsString("Ticker");
std::cout << level4 << "CHAIN_TICKER = " << strChainTicker << endl;
}
}
else
{
std::cout << level4 << "NO CHAIN_TICKER information" << endl;
}
}
}
}
}
关于第二个问题,彭博支持人员建议我选择一个非常高的数字,以便下载所有选项,即
override2.setElement("fieldId", "CHAIN_POINTS_OVRD");
override2.setElement("value", 50000);
对于第三个问题,可以通过设置&#34; CHAIN_EXP_DT_OVRD&#34;来下载所有到期日的链代码。覆盖&#39; ALL&#39; (这部分目前尚未经过测试):
Element override3 = overrides.appendElement();
override3.setElement("fieldId", "CHAIN_EXP_DT_OVRD");
override3.setElement("value", 'ALL');