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NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Publications by Marcus Opp

Contact and additional information for this authorAll NBER papers and publicationsNBER Working Papers only

Working Papers and Chapters

July 2013Regulatory reform and risk-taking: replacing ratings
with Bo Becker: w19257
We analyze a reform of insurance companies' capital requirements for mortgage-backed securities. First, credit ratings were replaced as inputs to capital regulation. Second, the redesigned system ensures capital buffers sufficient to withstand expected losses, but insufficient to protect against adverse outcomes. Many bonds are now treated as riskless and require minimal capital. By 2012, aggregate capital requirements for mortgage-backed securities have been reduced from $19.36bn (had the previous system been maintained) to $3.73bn. Exploiting that the change did not affect other asset classes, we document that insurers' risk taking was distorted and increased in response to the new regulation.
July 2012Target Revaluation after Failed Takeover Attempts – Cash versus Stock
with Ulrike Malmendier, Farzad Saidi: w18211
Cash- and stock-financed takeover bids induce strikingly different target revaluations. We exploit detailed data on unsuccessful takeover bids between 1980 and 2008, and show that targets of cash offers are revalued on average by +15% after deal failure, whereas stock targets return to their pre-announcement levels. The differences in revaluation do not revert over longer horizons. We find no evidence that future takeover activities or operational changes explain these differences. While the targets of failed cash and stock offers are both more likely to be acquired over the following 8 years than matched control firms, there are no differences between cash and stock targets, neither in the timing nor in the value of future offers. Similarly, we cannot detect differential operational polic...

Contact and additional information for this authorAll NBER papers and publicationsNBER Working Papers only

 
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