Offer your thoughts or opinion on the input financial query or topic using your financial background.

What is an ideal number of stock positions that I should have in my portfolio?
I would just buy one ETF (index-fund) on the market you think will perform better. It will take care to buy the 5 most solid stock in this market and many other more to reduce the risk to the bear minimum. You will also spend only few bucks in comissions, definitely less than what you would spend buying multiple stocks (even just 5). It's hard enough to forecast which market will perform better, it's even harder to do stock picking unless you have the time and the knowledge to read into companies' balance sheets/economic incomes/budgets/market visions etc. And even if you are great in reading into companies balance sheets/economic incomes/budgets, the stock market usually behaves like a cows' drove, therefor even if you choosed the most valuable solid stocks, be prepared to see them run down even a 50% when all the market runs down a 50%. During the 2008 crisis the Europe market has lost a 70%, and even the most solid sectors/stocks like "Healthcare" and "Food & Beverage" lost a painful 40% to 50% (true that now these sectors recovered greatly compared to the rest of the market, but they still run down like cows during the crisis, and if you holded them you would have suffered a huge pain/stress). But obviously there's always some profet/wizard which will later tell you he was able to select the only 5 stocks among thousands that performed well.