WhatIfInvest - Investment Calculator
Hey HN! I built WhatIfInvest to make it easy to answer investing “what if” questions in an approachable way for both new and seasoned investors. With it you can simulate historical returns for stocks, ETFs, or crypto, backtest custom-weighted portfolios, visualize dollar-cost averaging strategies, and share results instantly with simple links Some examples you can try include seeing how Nvidia vs. Bitcoin performed over the last 10 years, how a classic 60/40 portfolio held up, or what dollar-cost averaging $100/month into SPY since 2010 would look like. I realize these comparisons…
WhatIfInvest - Investment Calculator launched on August 4, 2025 with 13 votes, #983 of 8,530 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
What it does
A simple investment calculator to simulate historical returns, backtest portfolios, and explore dollar-cost averaging. Built for both beginners and experienced investors to visualize how different strategies would’ve performed over time.
In the maker’s words, at launch
Hey HN! I built WhatIfInvest to make it easy to answer investing “what if” questions in an approachable way for both new and seasoned investors. With it you can simulate historical returns for stocks, ETFs, or crypto, backtest custom-weighted portfolios, visualize dollar-cost averaging strategies, and share results…
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Quantifying opportunity cost with a deliberately "simple" web appFeb 2026 · shouldhavebought.com · ▲28Hi HN, A while ago I had a mildly depressing realization. Back in 2010, I had around $60k. Like a "responsible" person, I used it as a down payment on an apartment. Recently, out of curiosity, I calculated what would have happened if I had instead put that money into NVIDIA stock. I should probably add some context. For over 10 years I've worked as a developer on trading platforms and financial infrastructure. I made a rule for myself - never trade on the market. In 2015, when Bitcoin traded about 300 usd, my brother and I were talking about whether it was a bubble. He made a bold claim that…
Source: Product Hunt launch ↗ · launch text quoted in part
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