I'm working on a program that downloads and analyzes historical stock data from Yahoo Finance. I download the data in my program by using the wget command. I have a list of about 3,000 stock symbols and the .csv files for each one are downloaded twice (for weekly and monthly data). Could Yahoo flag my large amount of wget requests as an attack? Maybe as a dos attack of some sort?
The answer is subjective but wget simply makes HTTP GET requests, just as is done with a browser.
At worst one might claim a denial of service (DOS) attack but if only a single thread, most would classify as either normal use or perhaps aggressive crawling.