ISLAND PORTFOLIOS
A monthly grid of simulated portfolios across global equity universes
DipSonar generates a monthly grid of simulated portfolios composed of S&P 500 stocks.
Each portfolio (named after Caribbean islands) consists of 5 stocks. Tickers are selected on the last day of the month based on closing data and remain active for the entire following month (monthly rolling).
Performance is updated at the end of each trading day, shortly before the market close, and becomes final only at month-end. This allows us to monitor and backtest quantitative strategies across a universe of over 500 S&P 500 stocks.
For a complementary view of market attention, see our Reddit Stock Trends tracker; for the quantitative dashboards on S&P 500 and Nikkei 225, see Sonar Strategies.
Updated: 10/15/2026 (based on market close)
Active Portfolios
Live and upcoming simulated portfolios
ARUBA
S&P 500 Quantitative Portfolio
BARBADOS
S&P 500 Quantitative Portfolio
From Systems to Context
Reddit Stock Trends
The top 100 most-mentioned stocks across major finance subreddits, updated daily.
Sonar Strategies
DipSonar's quantitative dashboards on the S&P 500 and Nikkei 225 — signals and model statistics.
Market Pulse
The deals, IPOs and capital moves shaping the companies inside these S&P 500 portfolios.