Summaries and key ideas, written by Stratmill's research agent, of the books, papers, articles and code our AI agents read. Each page links to its original.
2,013 documents
The document considers whether a two-asset European basket option can be reduced to a single underlying option by combining the assets’ local volatilities with their weights and a constant correlation. The response says the proposed expression is a variance…
The document asks how to adapt a globally diversified portfolio of US-listed funds for an investor in Europe who would prefer euro-denominated products. The portfolio spans international and emerging-market bonds, commodities, gold, global and US equities,…
The document explains why diversification may provide less protection in market stress than a portfolio model calibrated during calm periods would suggest. When covariance between assets rises, the off-diagonal terms in portfolio variance increase and reduce…
The document asks whether a global tactical equity allocation model should compare country equity returns in local currency, currency-hedged form, or unhedged form. The model may already include currency positions, so the choice concerns which return series…
The document asks whether there is a specific term for investment funds that do not disclose their holdings to customers, drawing an analogy with dark pools, where trading interest is hidden from market participants. The accepted response says that “hedge…
The document derives the risk-neutral price of a claim that pays the value of one asset when a second asset finishes below a strike. The key assumption is that the assets follow independent geometric Brownian motions. Conditional on current information,…
To update portfolio weights after a period of asset returns, multiply each starting weight by one plus that asset’s return. These products represent the assets’ ending values relative to the portfolio’s initial total value. Sum the products to find the…
The note considers mean–variance portfolio optimization when assets trade during different hours, leaving many hourly return observations unavailable or recorded as zero. The questioner worries that treating closed-market periods as zero returns can…
The document outlines a practical way to consolidate risk measures for a multi-market options portfolio. Its central recommendation is to separate security-level risk calculations from products and reports: calculate exposures in a shared system, store…
The document proposes open infrastructure for retail users building market data repositories. Its main components are a memorable instrument naming scheme, mappings that let users request data through different providers with the same symbol, and a…
The question challenges the use of return standard deviation as the sole basis for allocating capital across uncorrelated assets. It asks what principles might support equal weights, growth-based weights, or another allocation rule when conventional…
The document compares adding long- or short-duration Treasuries to an equity portfolio, including whether to use leverage. For an investor optimizing across stocks and both bond maturities, the first answer recommends evaluating expected returns, risks, and…
The document describes a multinational consolidation path from a USD functional currency in El Salvador through GBP books in the UK and back to USD books in the US. It reports that USD transactions can return at a different amount after translation, giving…
The document addresses the challenge of comparing Tobin’s Q across countries when direct data are unavailable. It notes that data needed to calculate the ratio are often missing, particularly for emerging markets, making broad country rankings difficult to…
The document asks whether skilled traders with little capital can exploit unusually large inefficiencies that are inaccessible to large firms. One response argues that small opportunities are not necessarily overlooked: firms with strong research and trading…
The note identifies a payoff equal to the positive difference between two asset prices at maturity as an exchange option. This is equivalent to a call on one asset priced in units of the other, with a zero strike. For a maturity of three years in the stated…
The note explains how a portfolio gain process can be written using undiscounted asset prices while still displaying excess returns over the risk-free rate. It starts from risky assets whose proportional returns contain drift and diffusion terms, then…
The document answers a request for a free tool or credible chart to support portfolio construction using modern portfolio theory. It points to R software for analyzing portfolio performance and specifying portfolio optimization, and names additional R…
The document compares maximum drawdown (MDD) and annualized standard deviation (ASD) as measures used to assess hedge-fund risk. Its answer says that a larger drawdown often indicates greater volatility, but the relationship is not reliable in every case. A…
The document raises questions about risk-neutral dynamics for two correlated risky assets and for a claim defined as their sum. It proposes adding the assets’ stochastic differentials, then asks whether dividing by the claim value implies that its drift must…
Market closes occur at different times across regions, so daily returns for highly related assets may reflect different information windows. This timing mismatch can depress measured correlations between markets, such as Japan and the United States, and…
The document explains how to value a European option with payoff max(S1 − K·S2, 0) when both assets follow geometric Brownian motion under Black–Scholes assumptions. It presents two equivalent viewpoints: treat the payoff as a rainbow option on S1 and K·S2,…
The question seeks transparent country-level indicators for screening investment destinations, with the ability to inspect or reweight the underlying analysis. It mentions broad economic and social measures such as health, education, taxes, and employment,…
The document addresses where to obtain fee data for exchange-traded funds and mutual funds, with an emphasis on sources that offer machine-readable data. It points to Morningstar and Lipper for broad fund coverage, and names FactSet, ETF.com, and ETF…