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1. For each of the 30 stocks in the Dow Jones Industrial Average, download the closing prices for every trading day from January 1, 2018

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1. For each of the 30 stocks in the Dow Jones Industrial Average, download the closing prices for every trading day from January 1, 2018 to January 1, 2019. To download the prices, for example for symbol AAPL, we use the R package quantmod. The code is as the following: library(quantmod) data

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