Advanced processing of market return data including outlier detection, volatility clustering analysis, and regime identification.
process_market_returns(returns, method = "standard", window_size = 20)
List containing processed returns and additional metrics
if (FALSE) { # \dontrun{
data <- load_market_data(c("AAPL", "MSFT"))
processed <- process_market_returns(data$returns, method = "robust")
} # }