JS ISA

The chart shows the growth of an initial investment of £10,000 in JS ISA, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends. The portfolio is never rebalanced.

Based on dividend-adjusted daily data since Jun 13, 2019, JS ISA's average daily return is +0.20%, while the average monthly return is +4.29%. At this rate, an investment would double in approximately 1.4 years.

Historically, 59% of months were positive and 41% were negative. The best month was Aug 2020 with a return of +56.8%, while the worst month was Dec 2022 at -32.7%. The longest winning streak lasted 6 consecutive months, and the longest losing streak was 5 months.

On a daily basis, JS ISA closed higher 53% of trading days. The best single day was Apr 9, 2025 with a return of +19.3%, while the worst single day was Sep 8, 2020 at -16.3%.

JS ISA has an annualized alpha of 35.49%, beta of 1.41, and R2 of 0.27 versus S&P 500 Index. Calculated based on daily prices since June 13, 2019.

• This portfolio captured 326.88% of S&P 500 Index gains and 162.11% of its losses - amplifying both gains and losses, but participating more in upside than downside.
• R2 of 0.27 means this portfolio moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

JS ISA has an expense ratio of 0.23%, which is considered low. Below, you can find the expense ratios of the portfolio's funds side by side and easily compare their relative costs.

JS ISA ranks 13 for risk / return — in the bottom 13% of Portfolios on our site. This means you're taking on significantly more risk than the returns justify. Consider whether the potential upside is worth the volatility, or explore alternatives with better risk / return profiles.

The Sharpe ratio helps investors understand how much return they're getting for the level of risk taken. A higher Sharpe ratio indicates better risk-adjusted performance, meaning more reward for each unit of risk. Learn how to interpret the Sharpe ratio.

The current JS ISA Sharpe ratio is 0.88 as of Jun 13, 2026 (the value is recalculated daily), calculated over the past 12 months.

Compared to the broad market, where average Sharpe ratios range from 1.54 to 2.41, this portfolio's current Sharpe ratio places it in the bottom 25%. This suggests weaker risk-adjusted returns than most portfolios, possibly due to lower returns, higher volatility, or both. It may be worth reviewing the allocation. You can use the Portfolio Optimization tool to explore options for improving the Sharpe ratio.

The chart below shows the rolling Sharpe ratio of JS ISA compared to the selected benchmark. This view highlights how the investment's risk-adjusted performance has changed over time.

JS ISA provided a 0.14% dividend yield over the last twelve months.

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.

The table below displays the maximum drawdowns of the JS ISA. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the JS ISA was 65.66%, occurring on Jan 3, 2023. Recovery took 497 trading sessions.

The current JS ISA drawdown is 12.66%.

The chart below shows the rolling one-month volatility.