<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Contagion | Sebastian Stöckl</title><link>https://www.sebastianstoeckl.com/tags/contagion/</link><atom:link href="https://www.sebastianstoeckl.com/tags/contagion/index.xml" rel="self" type="application/rss+xml"/><description>Contagion</description><generator>HugoBlox Kit (https://hugoblox.com)</generator><language>en-us</language><lastBuildDate>Fri, 24 Apr 2026 00:00:00 +0000</lastBuildDate><image><url>https://www.sebastianstoeckl.com/media/icon_hu_579dce1bfbea7b2a.png</url><title>Contagion</title><link>https://www.sebastianstoeckl.com/tags/contagion/</link></image><item><title>Crypto Finance &amp; Infrastructure</title><link>https://www.sebastianstoeckl.com/projects/crypto-finance/</link><pubDate>Fri, 24 Apr 2026 00:00:00 +0000</pubDate><guid>https://www.sebastianstoeckl.com/projects/crypto-finance/</guid><description>&lt;h1 id="pricing-crypto-assets-when-the-sample-itself-is-biased"&gt;Pricing crypto assets when the sample itself is biased&lt;/h1&gt;
&lt;p&gt;Cryptocurrency markets are large, volatile, and — by now — extensively studied. Much of the empirical evidence, however, rests on samples that condition on survival: coins that failed, were delisted, or traded only briefly are silently dropped. The resulting portfolios overstate cross-sectional return predictability and obscure which anomalies are real. This is not a minor data-handling concern. In a universe where a substantial fraction of listed assets eventually disappears, survivorship conditioning is first-order for inference.&lt;/p&gt;
&lt;p&gt;This project does two things. First, it builds unbiased infrastructure — data sources and R packages that make the full, delisting-inclusive cross-section of cryptocurrencies available to researchers. Second, it uses that infrastructure to re-examine central crypto-finance findings (size, momentum, herding) and to measure how crypto risk propagates into traditional banking.&lt;/p&gt;
&lt;h2 id="bias-corrected-cross-sectional-evidence"&gt;Bias-corrected cross-sectional evidence&lt;/h2&gt;
&lt;p&gt;
documents annualised survivorship bias of 0.93% for value-weighted and 62.19% for equal-weighted buy-and-hold portfolios in a 3,904-asset cryptocurrency universe from 2014 to 2021. Once delisting returns are accounted for, a size effect is confirmed but substantially overstated in survival-conditioned samples, while momentum and market beta no longer price the cross-section. A non-trivial share of the published crypto anomaly evidence is an artefact of data truncation rather than genuine return predictability — a methodological wake-up call for the empirical crypto asset-pricing literature.&lt;/p&gt;
&lt;h2 id="behaviour-and-market-structure"&gt;Behaviour and market structure&lt;/h2&gt;
&lt;p&gt;
examines herding behaviour on the full, survivorship-bias-free cross-section of coins. Against prior evidence — which the paper attributes to sample bias — it documents statistically significant herding, reinforced under a beta-herding robustness check. It also introduces Bitcoin as a &lt;em&gt;transfer currency&lt;/em&gt;: herding measures centred on Bitcoin rather than on a value-weighted market portfolio better capture the dispersion of investor beliefs across the crypto cross-section.&lt;/p&gt;
&lt;h2 id="contagion-to-traditional-finance"&gt;Contagion to traditional finance&lt;/h2&gt;
&lt;p&gt;
uses the November 2022 failure of FTX as a natural experiment to measure crypto-related risk in U.S. banks. A market-based sensitivity measure — the historical covariance between bank stock returns and bitcoin returns — explains the cross-section of returns on 219 U.S.-listed financial institutions on the FTX announcement day. The measure is unrelated to standard proxies for operational risk (corporate governance, business complexity) but is significantly related to the Tier 1 capital adequacy ratio: on average, it is banks with sufficient liquidity reserves that venture into the crypto sphere.&lt;/p&gt;
&lt;h2 id="infrastructure-the-crypto2-r-package"&gt;Infrastructure: the crypto2 R package&lt;/h2&gt;
&lt;p&gt;The &lt;strong&gt;crypto2&lt;/strong&gt; R package provides survivorship-bias-free access to cryptocurrency market-cap data from coinmarketcap.com, including coins that have since been delisted. It is hosted on
with documentation at
. The package underpins the bias-correction work in the Liebi et al. paper and is used by outside researchers running survivorship-aware crypto studies.&lt;/p&gt;
&lt;h2 id="ongoing-work"&gt;Ongoing work&lt;/h2&gt;
&lt;p&gt;Cross-coin diversification effects, crypto-related risk in non-U.S. banks, and extensions of the FTX contagion methodology to other large failures (Terra-Luna, 3AC).&lt;/p&gt;
&lt;h2 id="collaborators"&gt;Collaborators&lt;/h2&gt;
&lt;p&gt;Lars Kaiser (formerly University of Liechtenstein), Manuel Ammann, Luca Liebi, Tom Burdorf (University of St.Gallen), Lukas Müller, Johanna Müller, Dirk Schiereck (TU Darmstadt).&lt;/p&gt;</description></item></channel></rss>