12 Notions
• Regulatory arbitrage. Tirole (2011) provides several examples, notably the
relaxing of accounting standards (Chapter 4) in the GFC which allowed -
nancial institutions to return to historical costs instead of market valuations
in certain circumstances. An incentive was thus given to sell assets whose
market valuation had increased, in comparison with the prices at which
they had been purchased, and to keep those whose market valuation had
decreased, thus avoiding to record losses.
1.3 Safe assets
Safe assets are not riskless assets. According to Gorton (2017), a “safe asset” is
an asset that can be used to transact without fear of adverse selection:
2
that is,
there are no concerns that the counterparty privately knows more about ...