Will my money last? A Monte Carlo simulation of your wealth
Run hundreds of possible market histories through your savings, income and spending to see the range of outcomes and the chance your money lasts.
Money questions, worked out.
Every calculator here shows its method, cites where the method came from, and lists what it does not account for. Calculations run in your browser, and changed figures appear in the page address so you can bookmark or share them.
Start here
How much house can I afford?
Estimate a comfortable purchase price from what you earn, what you spend, and what your savings and investments are earning while you decide.
Is it financially better for me to rent or buy a home?
Compare home equity with invested rental savings, and find the monthly rent that leaves you equally well off.
Market dashboards
Bitcoin allocation & global wealth
Explore Bitcoin valuation scenarios against pension assets, 401(k)s, sovereign wealth, corporate liquidity and gold, with sourced balances and adjustable allocations.
Buffett Indicator
Is the US stock market overvalued against the economy? Total stock market value as a share of GDP since 1951, with its exponential trend and standard deviation bands.
Crypto market board
Live Bitcoin, Solana and Ethereum prices, alongside IBIT, BSOL and ETHA and their implied after-hours values.
Economic health check
Which parts of the US economy are doing well and which are not: sector scorecards, recession warning signs, a custom leading index and the yield curve, from official data.
S&P 500 equity risk premium
How much extra the stock market pays over a safe 10-year Treasury: today’s earnings yield against the bond since 1962, and how much of the expected return rests on future growth.
Fed rate expectations
What markets expect the Federal Reserve to do at each coming meeting, from fed funds futures and Kalshi’s betting markets, against every rate move since 1954, with AI-identified news behind each sharp repricing.
Jupiter JLP vs SOL
Jupiter’s JLP liquidity token against SOL since launch, and against the same basket of coins held without lending: returns over any range, worst falls, yield and pool mix.
US mortgage rates
Daily 30 and 15 year fixed, jumbo, FHA, VA and USDA mortgage rates, Freddie Mac's weekly survey since 1971, and how far mortgages sit above the 10 year Treasury.
The Market Brief
A living newspaper for crypto, stocks and market catalysts. Live source-linked headlines with optional AI context.
S&P 500 price-to-sales ratio
Is the S&P 500 overvalued on sales? Today’s price-to-sales ratio against every quarter since 2000, with its mean and standard deviation bands.
REIT sectors
Total returns of every REIT property sector since 1993, layered on one chart, with each sector’s price to FFO, cap rate, payout, NOI growth and leverage.
Shiller PE ratio
The S&P 500 cyclically adjusted PE ratio: a live estimate against Robert Shiller’s monthly record since 1881, with its mean, median and extremes.
SOL yield strategy builder
Rule-based mixes of Orca SOL/USDC, SOL/JLP and JLP/USDC pools, USDC lending, JLP and mSOL: how they perform as SOL moves, with pool yields diluted by your own deposit.
US Treasury yield curve
Daily Treasury par yields for every maturity since 1962, with the curve on any date and an animated replay of how it has moved.
Tools
Build and compare plans with interactive tools that go beyond a single calculation.
How bond ETFs move with interest rates
What happens to TLT, IEF and SHY when rates rise or fall, when the Fed buys or sells bonds, if rates go negative, and when stocks look expensive, with a look-ahead where you place Fed rate cuts and hikes on the chart. Built on iShares’ live figures and a century of history.
ETF Combiner
Every stock inside an ETF at its exact weight, and the combined basket of stocks for any mix of ETFs or holding companies like Berkshire Hathaway, so you can build it yourself. Leave out holdings you don’t want and scale the rest back up to 100%.
Portfolio constructor
Rebuild market sector weights, replace selected sectors with LEAPS, and size stock exclusions. See the exposure, cash and downside tradeoffs before putting a plan together.