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.
9,660 documents
The document distinguishes transport protocols from presentation or wire formats used to exchange trading data. It says firms colocated in the same data center often use raw UDP for transport, and notes Aeron as another option that has gained use. For market…
The document considers how to study the volume-weighted bid-ask spread across time when retrieving intraday bid, ask, and volume data for many securities runs into a Bloomberg monthly usage cap. The question is whether Bloomberg can calculate daily or weekly…
The document examines why investors might avoid equity factor portfolios despite reported historical premiums. It groups the main explanations into four possibilities: apparent returns may be data-mined or overstated; mispricing may fade as investors learn;…
The document describes a Bloomberg workflow for identifying European equities that have listed options. It recommends using the securities finder to select equities, open the equity options category, and filter by fields such as currency or exchange before…
This document examines fitting a power-law model of market impact, in which impact depends on volatility and the traded quantity relative to market volume. It describes estimating the exponent and scale after taking logarithms, and defines signed impact…
The document clarifies how FX spot delta relates to option delta and settlement timing, using GBP/USD and USD/CHF examples. Its answer explains that spot itself has delta one by definition: its value changes one-for-one with the spot rate. FX option delta…
A resting limit order is an unmarketable limit order that remains on an exchange’s limit order book. A buy order is unmarketable when its limit price is below the lowest offer; a sell order is unmarketable when its limit price is above the highest bid. The…
The document describes the purpose of an intermarket sweep order in the context of Regulation NMS and displayed quotes across U.S. exchanges. Ordinarily, when an order reaches the best displayed price, routing rules may require the order to access other…
The document explains how to construct EUR/USD from EUR/GBP and GBP/USD spot quotes. With the quoted currency legs aligned as EUR per GBP and GBP per USD, multiplying the rates cancels the intermediate GBP exposure and yields EUR per USD. It states that the…
The document outlines a framework for choosing how often to rebalance a delta hedge during gamma scalping. Under geometric Brownian motion, it approximates the hedge adjustment as gamma times the underlying price move, then estimates trading costs by…
The document explains how securities lending is arranged and priced, particularly for equities. Large holders may invite dealers to compete for lending their securities, while smaller participants commonly work through multiple prime brokers. Online services…
The document discusses ways to detect short-term price pressure in equity tick data so an execution algorithm can pause buying after a rapid rise and resume when conditions stabilize. It distinguishes liquidity-driven activity within the order book from…
The discussion weighs storing precomputed daily, weekly, hourly, or minute bars against resampling them from tick data when needed. Its answer favors avoiding routine aggregate storage when the query system can handle the workload, while highlighting a…
The document examines how often to rebalance a delta hedge for a European call under Black–Scholes assumptions and geometric Brownian motion. The questioner estimates the local hedging error from the option’s gamma and the squared price move, while…
The document presents several proposed ways to set relative objective weights for alpha forecasts and transaction costs in a portfolio optimizer. The setting is monthly standardized factor-model forecasts combined with a nonlinear market-impact model…
The document compares communication protocols used across trading workflows. FIX is described as a widely used standard for order communication, while SWIFT is associated with post-trade and back-office functions. The answers distinguish order entry from…
The document discusses estimating a U.S. corporate bond’s price during London morning hours, when the U.S. bond market is closed. It proposes decomposing the bond into interest-rate and credit components, using the USD swap curve rather than Treasury rates…
This question concerns execution after an investor has already decided to buy or sell a particular instrument. The investor has a short window of several days to seek a better price and will use a market order at the deadline if the trade remains unfilled.…
This short question raises a central issue in option replication: transaction costs make the market incomplete, and asks what Leland’s modified volatility contributes to pricing and hedging. It also asks whether using that adjusted volatility allows an…
The document considers splitting a Monte Carlo pricing workload across threads, running smaller simulations in parallel, and averaging their net present values. The accepted response says this can work, while recommending that threads avoid sharing objects…
The document addresses failures in Python workflows that previously fetched foreign-exchange and other historical price data through Yahoo or Google with tools such as pandas datareader and ffn. The accepted answer attributes the Yahoo failure to changes in…
The document describes a Python error in code that retrieves two stock price series, calculates their returns, and uses the difference between the returns to form a pair-trading signal. The reported missing key is the concatenated pair name, even though that…
The document examines how an exchange or trading platform should reserve a user’s funds before submitting an order. For limit buys, the limit price and quantity give a known quote-currency amount; for sells, the base-currency quantity is known. A market buy…
The document discusses execution choices for a medium-sized share order when a simple algorithm follows the best displayed quote. A fleeting small order can improve the quote, induce the algorithm to join, then disappear; the resulting order may be left…