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The effects of employee stock option plans on operating performance in Chinese firms

Journal of Banking & Finance 2015 54, 141-159
As a part of the ongoing liberalization of the marketplace, Chinese regulators adopted the guideline called “Regulation of Equity Incentive Plans (trial)” to allow firms to provide employee incentives through employee stock option plans. Firms began initiating the plans in 2006. We investigate the impact of these plans on firm performance by comparing option-award firms with similar non-award matching firms. The change in ROE for the option-award firms is significantly higher than the matching firms. This is primarily due to their performance holding up better during the global financial crisis while the matching firms’ performance deteriorates. The stock price of these firms shows a positive reaction to the announcement, but no long-term abnormal returns. The better ROE performance for option-award firms is strong for subsets of the sample that are likely to benefit more from incentivized employees; specifically, privately owned firms, firms with higher board independence, and smaller firms. After various robustness tests, we conclude that the higher performance comes from the employee incentives, rather than earnings manipulation, a replacement of cash compensation, a binding of employees to executives, or gaming vesting periods.

Short interest and stock price crash risk

Journal of Banking & Finance 2015 60, 181-194 open access
Using a large sample of U.S. public firms, we find robust evidence that short interest is positively related to one-year ahead stock price crash risk. The evidence is consistent with the view that short sellers are able to detect bad news hoarding by managers. Additional findings show that the positive relation between short interest and future crash risk is more salient for firms with weak governance mechanisms, excessive risk-taking behavior, and high information asymmetry between managers and shareholders. Empirical support is provided showing that the relation between short interest and crash risk is driven by bad news hoarding.