The growth of modern banking is largely mortgage credit against land

The Claim

The long-run growth of the financial sector in advanced economies is not mainly the growth of business lending or of genuinely new financial services. It is, above all, the growth of mortgage credit — and mortgage credit is credit secured against real estate whose rising value is, in turn, overwhelmingly land. So a large part of what is usually described as "financial deepening" is better read as the banking system becoming the machinery through which land rent is capitalised and collected. This connects the FIRE sector to the land question with unusually strong long-run evidence.

The Evidence

• Banks became real-estate funds. Jordà, Schularick & Taylor's Great Mortgaging — a new long-run dataset of disaggregated bank credit for 17 advanced economies since 1870 — finds the mortgage share of bank lending roughly doubled, from ~30% in 1900 to ~60% by 2007, while non-mortgage lending stayed near-constant relative to GDP (~41%→46%) and mortgage lending rose from ~20% to 69% of GDP. The authors put it bluntly: the core business model of a modern bank "resembles that of real estate funds: banks are borrowing (short)… to invest (long) into assets linked to real estate." Household borrowing — mostly mortgages — accounted for about two-thirds of the entire increase in bank credit since 1960.[1]
• What the mortgage is really against is land. Knoll, Schularick & Steger's No Price Like Home — house-price indices for 14 economies, 1870–2012 — finds that the post-1950 house-price boom is attributable mostly to rising land prices, not construction costs. Since the collateral behind the mortgage boom is real estate, and the appreciating part of real estate is land, the credit expansion is, in economic substance, lending against a claim on land rent.[2]

Put together, the two findings mean that the century's great financial expansion is largely a land-credit expansion — the same conclusion the rentier-economy narrative reaches, here established from mainstream long-run data that make no reference to George or rent theory.

Why It Matters — and the Georgist Reading

If the financial sector's growth is mostly the financing of land, then two Georgist claims gain empirical footing. First, the 18-year land cycle and the land-speculation-causes-cycles account are not a fringe story about property: the mainstream credit-cycle literature shows the credit that fuels the cycle is overwhelmingly mortgage credit. Second, a land value tax — by pulling the untaxed capital gain out of land — would shrink precisely the collateral value that the mortgage-credit machine capitalises, which is why Georgists argue it would dampen the credit cycle at its source.

Honest Scope (rent gradient)

The strong, well-identified result here is about composition: finance's growth is mortgage-dominated, and the appreciating collateral is land. That is robust. It does not by itself establish the further, contested claim that financial-sector income is largely economic rent — Philippon's efficiency puzzle is suggestive on that front but not dispositive, and the FIRE-sector page carries the strongest counter-view (Cochrane: the size of finance is consistent with rising demand for genuine services, and the "FIRE" grouping itself can manufacture a rentier bloc by classification). The claim on this page is the one the evidence carries cleanly: the modern financial system is, first and foremost, in the business of lending against land.

See Also

• The FIRE Sector — the framing and the counter-view
• The Great Mortgaging · No Price Like Home — the two supporting studies
• Philippon (2015): the finance-efficiency puzzle — the income-side evidence, kept honest
• The 18-Year Land Cycle · Land speculation causes cycles
• Geoism — the rent-domain program and its gradient

Sources

1. Òscar Jordà, Moritz Schularick & Alan M. Taylor (2016), "The Great Mortgaging: Housing Finance, Crises and Business Cycles," Economic Policy 31(85), 107–152 (NBER WP 20501, 2014) — used for the mortgage-share doubling (~30%→60%), the "banks as real estate funds" characterisation, and the household-credit share (~two-thirds of credit growth since 1960). wiki summary · NBER PDF
2. Katharina Knoll, Moritz Schularick & Thomas Steger (2017), "No Price Like Home: Global House Prices, 1870–2012," American Economic Review 107(2), 331–353 — used for the finding that the post-1950 house-price boom is mostly rising land prices, not construction costs. wiki summary