Core concepts
Trading costs and dividends
Every test pays standard trading costs, reinvests dividends after the tax taken from them, and charges UK stamp duty where it applies.
On this page
Trading costs
Each order in a test pays 0.05% of its value in trading costs (4.5 basis points of slippage and 0.5 of commission), so a buy and a sell together cost 0.1%, or 10 basis points.
Choose an amount and a broker in the composer and the test uses that broker's published charges instead, such as a fee per deal or a currency fee, with whole or part shares as the broker allows.
Dividends
Returns are total return: each dividend is credited on its ex-dividend date to the shares held at the previous close, after withholding tax, and reinvested at that day's close (through the rebalance on a rebalance day, otherwise in the paying holding). Cash receives no dividends. The buy-and-hold benchmarks are total return too.
Tax taken from dividends
Dividend withholding is a UK-resident investor's default, deducted at source: UK shares 0%, US 15% (with a W-8BEN), and each European country's own rate before any treaty reclaim (Germany 26.375%, France 25%, Italy 26%, Spain 19%, Switzerland 35%, Netherlands 15%). Rates that depend on paperwork are flagged on the Strategy Agent's result card.
UK stamp duty
Stamp duty is deducted on purchases, never on sales: 0.5% on UK-incorporated shares (UK stamp duty reserve tax) and 1% on Irish-incorporated ones. ETFs pay none, and London lines of companies incorporated elsewhere are treated as paying none.
Testing UK and European shares shows a stored test with the stamp duty it paid.
Shares in another currency
If your account is in pounds and the shares are priced in dollars or euros, the engine values the holding in pounds at each day's exchange rate, and converts every purchase, sale and dividend at that day's rate. The rates are the Federal Reserve's daily rates. The rule itself reads the shares' own prices.
Cash
Cash the rule holds earns a stated interest rate, and the result says which rate it used.
Related
- Use caseBacktest UK and European sharesTest rules on London and European listings in pounds, with stamp duty, dividends after tax and daily exchange rates.
- Core conceptsWhat a test on past prices isA test, often called a backtest, replays a rule on past daily prices as if it had been followed then, with costs, and sets it beside simply holding.
- MethodologyHonest methodologyThe checks behind every result, with the thresholds they use: when a result holds a figure back, and why.
- MethodologyCorrectionsEvery fix that changed stored results, with the day it went live and how to tell an older result.
These pages describe how Quantis Trade works and what its tests show about the past. They are not forecasts and not advice.