It won't work. You can get close with the following, but Word doesn't really know what a sentence is.
Code:
Sub ScratchMacro()
'A basic Word macro coded by Greg Maxey
Dim i As Long
Dim oRng As Range
Set oRng = ActiveDocument.Range
oRng.Collapse wdCollapseStart
Do
oRng.MoveEnd wdParagraph, 1
For i = 2 To oRng.Sentences.Count
oRng.Sentences(i).InsertBefore Chr(11)
Next
oRng.Collapse wdCollapseEnd
Loop Until oRng.End + 1 = ActiveDocument.Range.End
lbl_Exit:
Exit Sub
End Sub
Now change to:
The Securities Exchange Act of 1934 was the second major piece of legislation. Introduced by Mr. McGoo, it resulted from the market crash of 1929. The Securities Exchange Act of 1934 regulates the secondary market ...
and run the code again.