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The matching principle in conventional accrual basis accounting, rather than cash basis accounting, recognizes accounting income by recording related expenses at the period when revenues are recognized. Accounting methods with high level of matching principle can be defined as neutrality in accounting in the sense that an impartial point of view is maintained in revenue and expense recognition. According to previous studies, it has been reported that the higher the level of matching principle is, the higher the quality of accounting income becomes. Thus, by analyzing the effects of the level of matching principle on the firm specific stock returns, post-earnings-announcement drift, this study examines earnings quality of matching principle is attributable to post-earnings-announcement drift. Previous studies find that earnings quality of earnings persistence is positively correlated with post-earnings-announcement drift. Thus, another estimate of earnings quality, the degree of matching revenues to expenses, is hypothesized to have the positive effect on post-earnings-announcement drift. Our results are generally consistent with the hypothesis. Findings show that firms with higher degree of revenue-expense matching have abnormal stock returns 10 days post-earnings announcement. Whereas over 10 days post-earnings announcement fail to show excessive stock returns. Some caveats can be attributable to these findings. The way we measure the degree of matching principle by the adjusted R² from revenue to expenses may not be adequate, and random walk model to estimate expected earnings may capture the properties with considerable errors. Nonetheless, over 2,000 observations in the period of 8 years can alleviate such errors in our results.