When deciding how much stock to buy at once, the "right" amount is usually determined by two main factors: your total portfolio size and your preferred entry strategy. Core Rules for Position Sizing
: Limit any individual stock to roughly 5%–10% of your total portfolio. This "position size" ensures that if one company fails, it won't wipe out your entire savings. how much stock should i buy at a time
Dollar-Cost Averaging vs Lump Sum Investing | Morgan Stanley When deciding how much stock to buy at