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You can use Cubic Splines to convert quarterly data into monthly. See also the following: Update: Take a look at the following link too:


You may want to take a look at this:


Apache Cassandra would be a good fit for storing real-time intraday data. It's a partitioned row store, where rows are organized into table using a partition key. It you use a schema where you store data for one ticker per row with partitioning by day or month (it has a limit of 2B records in a row), the operations in your questions would be very performant....

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