Cloaked Fortunes: IG Chemie, the 1932 Paris Raid, and Swiss Interwar Holdings

During the turbulent decades between the outbreak of the First World War in 1914 and the end of the Second World War in 1945, Switzerland evolved from a regional alpine banking hub into the world’s premier sanctuary for cross-border corporate holding companies and flight capital. Operating from financial centers in Basel, Zurich, and Geneva, Swiss commercial banks, trust companies, and corporate lawyers perfected legal instruments designed to insulate industrial assets from wartime confiscation, currency depreciation, and sovereign taxation. Three landmark episodes defined this interwar transformation: the creation and wartime disguising of the Basel chemical holding company IG Chemie (later Interhandel) on behalf of the German conglomerate I.G. Farben; the October 1932 Paris police raid involving Basler Handelsbank representatives, one of several pressures preceding the Federal Banking Act of 1934 and its criminal penalties for breaches of banking secrecy; and the agonizing restructurings of Switzerland’s giant electrical utility trusts—Elektrobank, Indelec, and Motor-Columbus—amid the collapse of international gold clauses and the 30 percent devaluation of the Swiss franc in September 1936. ^[1]

The Rise of Swiss Holding Companies and Electrical Trusts#

Switzerland’s prominence as an international corporate domicile began in the late nineteenth century through specialized financial trusts known as Finanzgesellschaften or holding companies, particularly in the capital-intensive electrical engineering and power generation industries. Because building municipal power grids, tramways, and hydroelectric plants across Europe and Latin America required vast upfront bond and equity financing, German industrial manufacturers teamed up with Swiss universal banks to establish holding entities on neutral soil. In Zurich, the German electrical giant AEG collaborated with Credit Suisse in 1895 to found the Bank für elektrische Unternehmungen, universally known as Elektrobank. In Basel, Siemens partnered with the Basler Handelsbank (Basel Commercial Bank) in 1897 to establish the Gesellschaft für elektrische Industrie, or Indelec. Meanwhile, in Baden, the Swiss engineering group Brown, Boveri & Cie (BBC) created the Motor AG trust in 1895, which merged with its Argentine sister vehicle in 1923 to form Motor-Columbus AG, the largest industrial holding company in interwar Switzerland. ^[2]

The First World War and the hyperinflations of the early 1920s violently disrupted these cross-border structures. Because Elektrobank and Indelec raised capital by issuing bonds denominated in hard Swiss francs while lending to utilities whose revenues accrued in depreciating German marks, Italian lire, French francs, and Russian rubles, both trusts suffered devastating balance-sheet mismatches between 1918 and 1923. Under the guidance of Credit Suisse and the Basler Handelsbank, Swiss corporate restructurers wrote down nominal share capital, converted maturing Swiss franc debentures into preferred equity, and severed direct German parent control so that the trusts could claim neutral Swiss nationality and escape Allied reparations seizures under the Treaty of Versailles. ^[3]

The lessons learned from rescuing Elektrobank, Indelec, and the Basel-based Société Suisse d’Électricité et de Traction during the early 1920s provided a blueprint for European multinationals throughout the interwar period. By incorporating a holding company in cantons such as Basel-Stadt, Glarus, or Zug—where cantonal holding privileges exempted foreign-sourced dividends from local profit taxes—foreign industrial syndicates could raise hard-currency capital on the Zurich and Basel bourses while shielding overseas subsidiaries behind neutral corporate charters, bearer shares, and Swiss bank nominee boards.

I.G. Farben’s Secret Basel Vehicle: IG Chemie (1928–1940)#

No corporation exploited the interwar Swiss holding architecture more ambitiously than the Interessen-Gemeinschaft Farbenindustrie AG (I.G. Farben), the Frankfurt-headquartered chemical and pharmaceutical cartel formed in late 1925 that stood as the largest industrial enterprise in Europe. Having lost its valuable American dyestuff, photographic, and pharmaceutical factories—including Bayer’s US operations—to seizure by the US Alien Property Custodian during the First World War, I.G. Farben’s managing board led by Carl Bosch and Hermann Schmitz was determined to rebuild its North American empire behind an impenetrable neutral shield. ^[4]

In June 1928, I.G. Farben reorganized an existing Glarus vehicle into the Basel-based Internationale Gesellschaft für Chemische Unternehmungen AG, commonly known as IG Chemie, with an initial share capital that was rapidly expanded to 290 million Swiss francs. Assisted by a consortium of prominent Swiss financiers—including Felix Iselin and Alfred Sarasin in Basel, along with Swiss Bank Corporation, Credit Suisse, and Union Bank of Switzerland—IG Chemie functioned as the international holding umbrella for I.G. Farben’s foreign participations. In 1929, I.G. Farben consolidated its newly acquired American dye, chemical, and Agfa photographic businesses into the Delaware-chartered American I.G. Chemical Corporation, which was renamed General Aniline & Film Corporation (GAF) in 1939. More than 89 percent of GAF’s voting shares were transferred into the custody of IG Chemie in Basel. ^[5]

On paper, IG Chemie was a publicly traded Swiss corporation whose board of directors consisted overwhelmingly of respected Swiss bankers, lawyers, and politicians, led by board chairman Hermann Schmitz (who served simultaneously as I.G. Farben’s chief financial director) and Basel attorney Felix Iselin. In reality, a web of contractual agreements bound the Basel holding company tightly to Frankfurt. Under a 1928 dividend-guarantee and option contract, I.G. Farben guaranteed that IG Chemie shareholders would receive exactly the same dividend rate paid on I.G. Farben’s own common stock in Germany, while Frankfurt retained an irrevocable contractual option to acquire IG Chemie‘s industrial assets at book value at any time. Furthermore, voting control inside IG Chemie was locked up through registered preference shares held by Swiss nominee companies funded directly by I.G. Farben. ^[6]

The October 1932 Paris Raid on the Basler Handelsbank#

While German industrialists used Basel holding companies to cloak overseas subsidiaries, wealthy French citizens turned to Basel and Geneva banks to shield liquid fortunes from French taxation and currency instability. During the late 1920s and early years of the Great Depression, the French Third Republic imposed steep coupon taxes of up to 20 percent on bond interest and stock dividends, alongside progressive income and inheritance levies to close a yawning state budget deficit. Swiss commercial banks dispatched traveling relationship managers to Paris and provincial French cities to solicit undeclared deposits, offering numbered accounts and cross-border courier services that cashed bond coupons in Basel free of French withholding taxes. ^[7]

On October 26, 1932, French police and examining magistrates acting on a tip raided a luxury suite at the Hôtel Regina in Paris occupied by visiting executives and representatives of the Basler Handelsbank. Catching the Swiss bankers in the act of meeting French clients, investigators seized coded ledgers, deposit receipts, and correspondence revealing an industrial-scale tax evasion network. Subsequent searches of the bank’s Paris representative office uncovered a master roster of more than 1,000 prominent French clients who had hidden between one billion and two billion French francs in untaxed accounts in Basel. ^[8]

When the seized client list leaked to the French press and was debated furiously in the Chamber of Deputies in November 1932, it triggered a political earthquake known as the Paris Affair. Among the exposed tax evaders were at least a dozen French senators and deputies, three Roman Catholic bishops, retired generals, prominent aristocrats, members of the Peugeot industrial dynasty, and the proprietors of the conservative newspaper Le Figaro. Outraged French authorities arrested the Basler Handelsbank employees in Paris, froze roughly 100 million French francs in assets belonging to the bank inside France, and demanded that Bern allow French fiscal investigators to inspect the bank’s books in Basel. ^[9]

The Swiss Federal Council and the Swiss Bankers Association flatly refused to grant judicial assistance, invoking the longstanding principle that tax evasion (unlike tax fraud involving forged documents) was an administrative rather than a criminal offense under Swiss law. Alarmed by French espionage efforts to bribe Swiss bank clerks for client lists—and facing simultaneous pressure from Nazi Germany, which in mid-1933 enacted harsh capital-flight laws imposing the death penalty on Germans holding undeclared foreign assets—Swiss legislators moved to strengthen bank confidentiality. That legislation also addressed supervision, bank failures and political pressures; the 1932 affair was not its sole cause. When the Swiss Parliament passed the landmark Federal Act on Banks and Savings Banks on November 8, 1934 (effective March 1, 1935), it included Article 47, which elevated banking secrecy from a civil contractual duty into a federal criminal statute. Henceforth, any bank officer, employee, or auditor who divulged client information to third parties or foreign authorities faced up to six months in prison and a fine of up to 50,000 Swiss francs, prosecuted automatically by the state. ^[10]

The 1936 Franc Devaluation and the Gold Clause Rulings#

Even as the 1934 Banking Act cemented Switzerland’s legal wall against foreign tax collectors, the country’s major banks and industrial holding trusts faced an acute solvency crisis brought on by global monetary fragmentation. Between 1931 and 1935, Britain abandoned the gold standard, Germany imposed Draconian exchange controls and the 1931 Stillhalteabkommen (Standstill Agreements) freezing short-term foreign bank credits, and the United States abrogated gold clauses in public and private debt contracts under Joint Resolution of June 5, 1933. Because Swiss banks—including the severely weakened Schweizerische Volksbank, the Banque d’Escompte Suisse (which collapsed in April 1934), and the Basler Handelsbank—as well as utility trusts like Elektrobank and Indelec had lent billions of Swiss francs into Germany and Central Europe, frozen foreign credits crippled their liquidity.

To protect cross-border loans against currency depreciation, Swiss holding companies and bond syndicates had routinely inserted gold clauses (Goldklauseln) or dual-currency options into international loan indentures during the 1920s. By the mid-1930s, roughly one-third of Elektrobank‘s outstanding credit portfolio contained explicit gold or Swiss-franc repayment clauses. However, when foreign debtors invoked the 1933 US Joint Resolution or German foreign-exchange decrees to pay off gold-clause bonds in depreciated paper currency, bondholders and holding companies collided in the Swiss courts.

In a series of closely watched rulings culminating in 1936, the Swiss Federal Supreme Court (Bundesgericht) in Lausanne adjudicated the enforceability of foreign gold clauses and foreign exchange restrictions. The Court held that German exchange controls blocking hard-currency debt service violated Swiss public policy (ordre public), affirming the right of Swiss creditors to attach German debtor assets located inside Switzerland. At the same time, when evaluating bonds governed by American law that contained gold-coin clauses, the Federal Supreme Court recognized the applicability of US monetary legislation where performance was tied to the United States, forcing Swiss holding companies and bondholders to absorb painful valuation write-downs. The monetary reckoning reached its climax on September 27, 1936: immediately after France devalued the franc and shattered the Gold Bloc, the Swiss Federal Council abandoned the pre-war gold parity and devalued the Swiss franc by approximately 30 percent. While the 1936 devaluation revived Swiss export competitiveness and eased domestic deflation, it forced holding trusts like Indelec, Elektrobank, and Motor-Columbus to execute sweeping balance-sheet reorganizations, trimming foreign short-term lending in favor of domestic Swiss hydroelectric infrastructure.

Wartime Camouflage and the 23-Year Interhandel Battle#

As the Second World War erupted in September 1939 and the risk of American entry grew, I.G. Farben and the Swiss board of IG Chemie moved urgently to execute a legal “Swissification” (Verelvetisierung) of the Basel holding company to prevent Washington from seizing General Aniline & Film as enemy property. In June 1940, an extraordinary general meeting of IG Chemie in Basel formally terminated the 1928 dividend-guarantee and option contract with I.G. Farben, and Hermann Schmitz resigned as board chairman, leaving Basel lawyer Felix Iselin at the helm. Swiss banks simultaneously exercised options and rearranged preferred voting shares so that Swiss nationals and institutions appeared to hold roughly 75 to 85 percent of IG Chemie‘s share capital.

The US Treasury Department and Department of Justice refused to accept the 1940 reorganization as genuine. On February 16, 1942—two months after Pearl Harbor—and in subsequent vesting orders under the Trading with the Enemy Act, the US Office of Alien Property Custodian seized 455,448 Class A shares and 2,050,000 Class B shares of General Aniline & Film held by IG Chemie, representing more than 90 percent of GAF’s ownership and valued at over $100 million. American investigators contended that IG Chemie remained a camouflaged front (Tarnfirma) controlled by I.G. Farben through secret gentleman’s agreements and Swiss bank nominees, notably the private bank H. Sturzenegger & Cie in Basel.

In December 1945, days after the Allied Control Council seized I.G. Farben’s assets in occupied Germany, IG Chemie rebranded itself as Internationale Gesellschaft für Handels- und Industriebeteiligungen AG—universally known as Interhandel—and petitioned the Swiss government to unfreeze its assets under the 1946 Allied-Swiss Washington Accord. While the Swiss Compensation Office cleared Interhandel as a predominantly Swiss enterprise in 1948, the US Department of Justice rejected that finding when Interhandel sued in the US District Court for the District of Columbia in October 1948 to recover the GAF shares. When US courts ordered Interhandel to produce the internal banking records of H. Sturzenegger & Cie to prove that the ultimate beneficial owners were not German, the Swiss Federal Council confiscated the Sturzenegger files in Basel and prohibited their disclosure under Article 47 of the 1934 Banking Act and Article 273 of the Swiss Penal Code (economic espionage).

The deadlock escalated into one of the most famous proceedings in international legal history: the Interhandel Case (Switzerland v. United States of America) before the International Court of Justice (ICJ) in The Hague, filed by Switzerland in October 1957. On March 21, 1959, the ICJ dismissed Switzerland’s application as inadmissible on the procedural ground that Interhandel had not yet exhausted its local legal remedies in the United States, where the US Supreme Court had recently reopened discovery proceedings. With Interhandel now heavily controlled by the Union Bank of Switzerland (UBS) led by Alfred Schaefer, Washington and Basel finally negotiated a pragmatic settlement under the Kennedy administration in 1963. In March 1965, the US government auctioned off General Aniline & Film on Wall Street for $329.1 million—splitting the net proceeds so that Interhandel received approximately $122 million (over 500 million Swiss francs), which made cash-rich Interhandel the target of a landmark 1967 merger with UBS that propelled the Zurich lender to the top of Swiss banking. Meanwhile, the weakened Basler Handelsbank had already been absorbed by the Swiss Bank Corporation in 1945, closing the interwar chapter that forged modern Switzerland’s offshore corporate and banking architecture.

Theoretical & Balance-Sheet Transmission Mechanism#

In the Kindleberger–Minsky taxonomy of financial instability (Kindleberger, 1978; Minsky, 1986) and Irving Fisher’s (1933) debt-deflation framework, speculative asset booms become systemic crises when credit expansion shifts balance sheets from hedge finance (cash flows covering principal and interest) to speculative and Ponzi finance (relying on rising asset prices and short-term margin roll-overs).

Once monetary tightening or an exogenous shock halts price appreciation, forced margin liquidations trigger Fisherian debt-deflation: fire-sale asset discounts erode bank collateral values, contracting credit supply across the real economy.

Sources and Further Reading

1. Mario König, “Interhandel: Die schweizerische Holding der IG Farben und ihre Metamorphosen – eine Affäre um Eigentum und Interessen (1910–1999),” Independent Commission of Experts Switzerland – Second World War (UEK / Bergier Commission), 2001. Historical & Financial Reference
2. International Court of Justice, “Interhandel (Switzerland v. United States of America) – Overview of the Case,” International Court of Justice, 1959. Historical & Financial Reference
3. Institute for International Law and Justice, “The Interhandel Case (Switzerland v. United States of America), Judgment of 21 March 1959,” International Court of Justice Reports / NYU Law IILJ, 1959. Historical & Financial Reference
4. Helvetica Register, “Basel: The Paris Affair of 1932,” Helvetica Register, 2023. Historical & Financial Reference
5. Helvetica Register, “Zurich: The Banking Act of 1934 and Banking Secrecy – Overview and Summary,” Helvetica Register, 2023. Historical & Financial Reference
6. Serge Paquier, “Swiss Holding Companies from the Mid-Nineteenth Century to the Early 1930s: The Forerunners of Multinationals,” Business and Economic History, Vol. 23, No. 1, 1994. Historical & Financial Reference
7. R. Vogler, “The genesis of Swiss banking secrecy: political and economic environment,” Financial History Review (Cambridge University Press), 2001. Peer-Reviewed / Academic Research
8. Patrick Emmenegger, “The Politics of Financial Intransparency: The Case of Swiss Banking Secrecy,” Swiss Political Science Review, 2014. Peer-Reviewed / Academic Research
9. Irving Fisher — "The Debt-Deflation Theory of Great Depressions," Econometrica 1, no. 4 (FRASER Federal Reserve Archive, 1933): 337–357 Central Bank / Monetary Authority
10. Charles P. Kindleberger & Robert Z. Aliber — Manias, Panics, and Crashes: A History of Financial Crises (Palgrave Macmillan) Peer-Reviewed / Academic Research

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