Posts on finance — Page 2

The mechanics behind connecting a budgeting app to your bank account, why screen scraping is dying, and where the US open banking rules stand in 2026.

Tax-loss harvesting turns a losing position into a deduction, but the mechanics are fussier than the pitch suggests. Here's how the netting order, the wash sale rule, and the cost-basis catch actually work.

There is no order book behind a decentralized exchange swap. There is a formula. Here is the math that sets the price, and why liquidity providers can lose money while doing everything right.

Tap your card and the money looks instant, but four different companies and a fee called interchange are quietly settling up behind the scenes. Here's how that machinery works and why it's suddenly a political fight.

Market, limit, and stop orders each trade off price against execution in a different way. Here is how they actually work, with a worked example.

Ethereum's mainnet can only handle so many transactions, but Layer-2 rollups solve that bottleneck without giving up the security guarantees that make the chain worth using.

BNPL looks simple at checkout, but the plumbing underneath is surprisingly complex. Here's how providers actually make money, and where the risks sit.

Stablecoins promise $1 forever, but the mechanics behind that stability vary wildly. Here's how fiat-backed, crypto-backed, and algorithmic designs each approach the peg — and what can go wrong.

A practical explainer on how stock options work — what calls and puts are, how they're priced, and what time decay means for buyers and sellers.