我创建了一个用户表单,允许用户更改选项定价所涉及的各种变量(行使价,波动率......等),同时允许用户更改达到价格所需的模拟(或平均值)在这种情况下的价格)。但是,单击确定按钮后,我无法在代码中调用公共子设备。任何关于我做错的建议都将不胜感激。 [我还在下面附上了我的用户表格的图片]
Option Explicit
Private cancel As Boolean
Public Function ShowInputsDialog(currentPrice As Single, _
exercisePrice As Single, riskfreeRate As Double, _
volatility As Single, duration As Single, simulation As Double) As Boolean
Call Initialize
Me.Show
If Not cancel Then
'Capture the other inputs.
currentPrice = txtCurrentPrice.Text
exercisePrice = txtExercisePrice.Text
riskfreeRate = txtRiskfreeRate.Text
volatility = txtVolatility.Text
duaration = txtDuration.Text
simulation = txtSimulation.Text
ShowInputsDialog = Not cancel
Unload Me
End Function
Public Sub ErrorCheck()
' Perform error checking for user inputs.
If IsNumeric(currentPrice) = False Or currentPrice < 0 Then
MsgBox ("Please enter a numeric value for the Current Price")
End If
If IsNumeric(exercisePrice) = False Or exercusePrice < 0 Then
MsgBox ("Please enter a positive numeric value for the exercise price")
End If
If IsNumeric(riskfreeRate) = False Then
MsgBox ("Please enter a numerical value for the risk-free rate")
End If
If IsNumeric(volatility) = False Then
MsgBox ("Please enter a numerical value for the Standard deviation")
End If
If IsNumeric(duration) = False Then
MsgBox ("Please enter a numerical valye for duration")
End If
End Sub
Public Sub Call_Eur(currentPrice As Single, _
exercisePrice As Single, riskfreeRate As Double, _
volatility As Single, duration As Single, simulation As Double)
Dim stockPrice As Single
Dim CallcashflowTermination As Single
Dim PutcashflowTermination As Single
Dim CalldiscountedValue As Double
Dim PutdiscountedValue As Double
Dim i As Integer
Dim CallMean As Double
Dim PutMean As Double
Dim arrayCallPrice() As Integer
Dim arrayPutPrice() As Integer
For i = 1 To simulation
' stock price
stockPrice = currentPrice * Exp((riskfreeRate - 0.5 * volatility ^ 2) * duration + volatility * Application.WorksheetFunction.Norm_Inv(Rnd(), 0, 1) * Sqr(duration))
' option cash flow at termination
CallcashflowTermination = Application.WorksheetFunction.Max(0, stockPrice - exercisePrice)
PutcashflowTerminatio = Application.WorksheetFunction.Funciton.Max(0, exercisePrice - stockPrice)
' discounted value of the option
CalldiscountedValue = CallcashflowTermination * Exp(-duration * riskfreeRate)
PutdiscountedValue = PutcashflowTermination * Exp(-duration * riskfreeRate)
arrayCallPrice(i) = CalldiscountedValue
arrayPutPrice(i) = PutdiscountedValue
CallMean = Application.WorsheetFunction.Average(arrayCallPrice)
PutMean = Application.WorksheetFunction.Average(arrayPutPrice)
Next i
MsgBox "The Call option price is " & CallMean & " the Put option price is " & PutMean
End Sub
Private Sub CmdCancel_Click()
Me.Hide
cancel = True
End Sub
Private Sub CmdOK_Click() '<--- ERROR!!!
Call Call_Eur(currentPrice As Single, _
exercisePrice As Single, riskfreeRate As Double, _
volatility As Single, duration As Single, simulation As Double)
End Sub
Private Sub UserForm_Click()
End Sub