U.S. Experience with Futures Transactions Taxes : Effects in a Highly Intermediated Market

The transactions tax on futures sharply reduced trading volume on wheat and corn contracts during the 1920s and 1930s but had no apparent effect on volatility or market quality. I find no evidence of a tax effect on open interest: I hypothesize this is because the relative magnitude of the tax was significantly higher for intermediaries than for other participants. Instead, the tax appears to have substantially reduced intra-day trading but not longer-term positioning. Volume-related proxies of liquidity therefore exhibit a strong relation with tax rates, but other measures of market quality show no relation to tax rates. In the long-run, however, exchange members doubled the minimum tick size in order to retain a large number of market makers and offset the impact of the tax