I need to download and upload stock market data into Google sheet

I need to download and upload some stock market data into Google Sheet. This is data for 1950 companies and hence need to do with zero defect. So even smallest mistake won't be accepted. I will give you all exact instructions. Task: Download data of 1950 companies and upload into Google sheet. Payout only after my testing I confirm that it is Zero defect otherwise no partial pay-out will be released.