There are many instances where it may be desirable to know what an ETF's holdings are. For example, you might want to:
- maintain a long/short position in the ETF with the exception/inclusion of a few securities
- approximately replicate a desired portfolio via linear combinations of different ETFs
- avoid possible lack of liquidity, tracking issues, and inefficient habits of an otherwise good ETF
Is there a way for our algorithm to fetch the data before the trading day begins?