The NSW Office of State Revenue has released stamp duty data to June, which reveals a massive $1.65 billion (24%) decline over the past year and a $2.3 billion (31%) decline since stamp duty receipts peaked in October 2017:

The latest retracement in stamp duty receipts follows a sharp 23% decline in property transfers in the year to June:

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The annual decline in revenue has dwarfed the GFC experience:
