Latvian lats standard from its introduction till 1940. On 17 June 1940, Latvia was occupied by the USSR. After the dismantling of the Bank of Latvia and its replacement with the Latvia Republican Office of the Gosbank on 10 October, the Soviet ruble was introduced alongside the lats on 25 November 1940 at par, although the real monetary value of the rouble was about three times lower and thus both wages and prices were gradually raised to devalue the lats from June to November 1940. To lessen the effect of the exodus of goods sent by Soviet occupational personnel to the USSR,
Currency substitution displaced by a stable currency. At the beginning of this process, the store-of-value function of the domestic currency is replaced by the foreign currency. Then, the unit-of-account function of the domestic currency is displaced when many prices are quoted in a foreign currency. A prolonged period of high inflation will induce the domestic currency to lose its function as medium of exchange when the public carries out many transactions in foreign currency. Ize and Levy-Yeyati (1998) examine the determinants of deposit and credit currency substitution, concluding that currency substitution is driven by the volatility of inflation and the real exchange