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Python算法交易
book

Python算法交易

by Yves Hilpisch
November 2022
Intermediate to advanced
392 pages
10h 8m
Chinese
China Electric Power Press Ltd.
Content preview from Python算法交易
使用实时数据和套接字
|
225
7.1
运行一个简单的实时数据服务器
本节演示了如何基于模拟金融工具价格运行简单的实时数据服务器。我们使用几何
布朗运动(无分频)模型生成数据,该模型可以使用精确的欧拉离散化,如式(
7-1
)
所示。其中,
S
是金融工具价格,
r
是恒定的短期利率,
σ
是恒定的波动率因子,以
及
z
是标准正态随机变量。
Δ
t
是金融工具价格的两次离散观察之间的时间间隔。
式(7-1):几何布朗运动的欧拉离散化
S
t
= S
t
·exp r
2
2
+
第
7.7.1
节介绍了一个
Python
脚本,该脚本利用此模型,使用
ZeroMQ
和一个名为
StockPrice
的类实现了一个实时数据服务器,以随机方式发布新的模拟实时数据。
有两种随机化发布方式。第一种,股价本身就是基于蒙特卡罗模拟的。第二种,将
两个发布事件之间的时间间隔随机化。本节的剩余部分详细解释了脚本的主要部分。
如下所示,脚本的第一部分是一些包导入,其中包括
ZeroMQ
的
Python
包。它还实
例化了打开
PUB
类型套接字所需的主要对象。
import zmq
import math
import time
import random
context = zmq.Context()
socket = context.socket(zmq.PUB)
socket.bind('tcp://0.0.0.0:5555')
导入
ZeroMQ
库的
Python
包。
实例化一个
Context
对象。它是套接字通信的关键对象。
套接字基于
PUB
套接字类型(“通信模式”)定义。 ...
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Publisher Resources

ISBN: 9787519869694