We capture the data as soon as it’s available to us – stock market data after daily market close, jobs data once a month and GDP data once a quarter. After verifying the raw data, we then calculate updated cumulative and annualized performance data for the current president (the data for previous presidents have been calculated and verified in advance).

Some metrics are measured daily (like stock market performance), monthly (like jobs growth) and quarterly (like GDP growth). We start measurement of performance for a president from the first full time period after their inauguration. For stock market performance, it is the first stock market day in office. For jobs growth, it’s…