Abstract
We introduce a notion of volatility uncertainty in discrete time and define the corresponding analogue of Peng's G-expectation. In the continuous-time limit, the resulting sublinear expectation converges weakly to the G-expectation. This can be seen as a Donsker-type result for the G-Brownian motion.
| Original language | English |
|---|---|
| Pages (from-to) | 664-675 |
| Number of pages | 12 |
| Journal | Stochastic Processes and their Applications |
| Volume | 122 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:This research was supported by the European Research Council Grant 228053-FiRM , the Swiss National Science Foundation Grant PDFM2-120424/1 , the Swiss Finance Institute and the ETH Foundation .
Keywords
- G-expectation
- Volatility uncertainty
- Weak limit theorem
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