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Matteo Smerlak

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Preprint Oct 2026

Optimal Trading Filters and the Value of Predictive Signals

The value of a forecast depends on its accuracy, but also on its actionability. In trading, an investor must translate return forecasts into positions while accounting for trading costs and the lingering impact of earlier trades. We solve the stationary quadratic trading problem with transient price impact using tools...

Matteo Smerlak · 0 citations
Preprint Jul 2026

Spectra of high-dimensional Spearman correlation matrices under scale-mixture dependence

We study the asymptotic spectral properties of high-dimensional Spearman correlation matrices for scale-mixture data. We consider observations of the form $x_t=\sigma_t \xi_t \in \mathbb{R}^N,$ where the coordinates of $\xi_t$ are i.i.d.\ and the scalar mixture variable $\sigma_t$ is shared by all coordinates. Under na...

J. Bouchaud, Pierre Bousseyroux, Tomas Espana et al. · 0 citations

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