The fundamental theorem of asset pricing with and without transaction costs
Mathematical Finance, Volume 35, Issue 2, Page 567-609, April 2025.Abstract We prove a version of the fundamental theorem of asset pricing (FTAP) in continuous time that is based on the strict no‐arbitrage condition and that is applicable to both frictionless markets and markets with proportional transaction costs. We consider a market with a single risky asset whose ask price process is higher than or equal to its ...
Christoph Kühn
wiley +1 more source
Relative Arbitrage Opportunities With Interactions Among N Investors
Mathematical Finance, EarlyView.ABSTRACT The relative arbitrage portfolio outperforms a benchmark portfolio over a given time‐horizon with probability one. With market price of risk processes depending on the market portfolio and investors, this paper analyzes the multi‐agent optimization of relative arbitrage opportunities in the coupled system of market and wealth dynamics.
Tomoyuki Ichiba, Nicole Tianjiao Yang
wiley +1 more source
Regional divergence in female cancer mortality in Brazil signals the unequal pace of the cancer transition. [PDF]
BMC CancerMuzi CD +6 more
europepmc +1 more source
On Short‐Term Behavior of Implied Volatility for Index Options
Mathematical Finance, EarlyView.ABSTRACT This paper investigates short‐term behavior of implied volatility of derivatives written on a market index when the index is constructed using a ranking procedure. Even when stock prices follow geometric Brownian motion dynamics, the ranking mechanism can lead to the observed term structure of at‐the‐money (ATM) implied volatility skew for ...
Huy N. Chau, Duy Nguyen, Thai Nguyen
wiley +1 more source
Operator-level quantum acceleration of non-logconcave sampling. [PDF]
Proc Natl Acad Sci U S ALeng J, Ding Z, Chen Z, Lin L.
europepmc +1 more source
Inflation Inequality Across Household Income Groups in Brazil: Persistence, Trend and Volatility
The Manchester School, EarlyView.ABSTRACT This article investigates inflation inequality across four income strata in Brazil (very low, low, middle, and high income) from July 2006 to April 2025, using the Headline IPCA as a benchmark. We test the hypothesis that inflation dynamics and transmission mechanisms are structurally unequal and disproportionately affect lower‐income ...
Sinara do Valle, Cleomar Gomes da Silva
wiley +1 more source
Global trends and the case of China in Cardio-Kidney-Metabolic multimorbidity: development and validation of a composite risk index using GBD 1990-2021 data. [PDF]
J Health Popul NutrLu X +9 more
europepmc +1 more source
Is A Little Learning Dangerous?
Noûs, EarlyView.ABSTRACT I argue that a little learning is often dangerous even for ideal reasoners who are operating in extremely simple scenarios and know all the relevant facts about how the evidence is generated. More precisely, I show that, on many plausible ways of assigning value to a credence in a hypothesis H, ideal Bayesians should sometimes expect other ...
Bernhard Salow
wiley +1 more source
Bridging local and global tortuosity of retinal vessels: Objective testing of index performance. [PDF]
PLoS OneRamírez N, Ralló M, Millan MS.
europepmc +1 more source
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT In VECMs (or CVARs), the weak exogeneity of some of the variables (for the long‐run parameters) is related to the equilibrium adjustment dynamics. This has sometimes led to the statistical concept of weak exogeneity being given a causal interpretation.
Emanuele Lopetuso, Michael P. Clements
wiley +1 more source