Option trading

In an era of increasingly fragmented market microstructure, the emergence of cross-asset connectedness between Crypto and public equity markets presents a critical challenge for modern portfolio construction. This blog post examines the recent working paper by Harin de Silva, “The Attention Factor: The Speculative Risk You May Already Own,” which identifies a previously underappreciated transmission channel: a speculative cohort of marginal investors whose sentiment shifts propagate correlated price movements across BTC, zero-day-to-expiration (0DTE) options, commission-free brokerages, and social-sentiment-driven equities. The author introduces the Attention factor—a capital-backed measure of collective conviction—as a systematic risk driver that persists after controlling for traditional macro factors, fundamentally reshaping how we model Equity Risk in multi-asset portfolios. For quantitative practitioners, this work underscores the need to augment conventional Risk Models with sentiment-aware factors to capture residual connectedness that standard factor frameworks may overlook.

Recent market action has once again underscored how rapidly volatility can surface across asset classes, as evidenced by pronounced price swings in gold, silver, and cryptocurrency markets. Such episodes routinely revive debate within the quantitative community about structural drivers of intraday instability, with particular attention paid to the growing prominence of S&P 500 zero-days-to-expiration (0DTE) options. The rapid proliferation of these ultra-short-dated contracts has fueled concerns among practitioners, regulators, and exchange operators that concentrated option activity may transmit destabilizing hedging flows into the cash equity market. At the same time, the paper under review challenges this prevailing spillover hypothesis, suggesting that the availability of 0DTE options systematically alters market-makers’ hedging exposures in a way that may dampen, rather than amplify, realized index volatility. So, do 0DTE options truly increase market volatility?