The incremental information content of non-US GAAP earnings disclosures: Evidence from UK firms

This paper examines price and trading volume responses in the US equity market to the preliminary earnings announcements (PEAs) in the UK of UK firms listed on US exchanges (e.g., NYSE and AMEX). The inquiry focuses on whether the return forecast error (absolute and squared values) and volume residual (standardized and unstandardized) for each day were significantly different from the average on the day of the earnings announcements (PEA). The most significantly unexpected return occurred the day prior to the Financial Times (FT) announcement. The results suggest prompt volume and price responses to the UK PEAs in the US security market. Excess trading volume occurred the day prior to and the day of the FT release price response occurred on the day subsequent to the PEAs. This may suggests that investors possess differential prior beliefs or likelihood functions in evaluating public disclosure. Consistent with Frost and Pownall [Frost, C., & Pownall, G. (1996), Interdependencies in the global markets for capital and information: The case of Smithkline Beecham plc. Accounting Horizons, 1, 38-57], US investors seem not to be confused by US/UK generally accepted accounting principles (GAAP) differences, and in fact use information about UK GAAP earnings in their valuations and trading decisions. This implies that traders correctly use UK accounting output to the determination of values in setting security prices and arriving at trading decisions. Broadly, these findings support the assumption that disclosures by UK-listed firms in their domestic market influence share liquidity and trading in the US market.