Most market questions don't need a Bloomberg Terminal.
Here are the three free data sources I use with Claude Code, and the exact prompts to get started.
yfinance - Price data
A free Python library for Yahoo Finance prices: stocks, ETFs, indexes, futures and currencies, daily going back decades.
Ask: "When was the last time the S&P 500 fell 5% in a day, and what did it do over the next month?"
FRED - Economic data
The St. Louis Fed's free database: jobs, inflation, rates, housing, hundreds of thousands of series. You can download them without an API key.
Ask: "What did the 10-year Treasury yield do in the year after each of the Fed's first rate cuts?"
SEC EDGAR - Company filings
Every public company filing, plus an API that returns reported financials as data instead of PDFs.
Ask: "Is $MSFT 's cloud revenue growing as fast as its capex?"
Start with the market question you've always wanted answered. Odds are the data's sitting in one of these three.
Most companies that pay for AI now pay both Anthropic and OpenAI.
At the start of 2024, almost all of them paid OpenAI compared to about 4 in 100 for Anthropic.
By September, Anthropic had pulled ahead: 78 in 100 paid Anthropic and 73 in 100 paid OpenAI.
Hotel stocks just checked in at record highs.
Marriott $MAR is up 18.5% and Hilton $HLT is up 17.7% since the S&P 500's last record on October 6. Both closed at all-time highs yesterday.
Over the same stretch, Nvidia $NVDA is down 29.4% and chip stocks are down 24.4%.
Marriott rose on 8 of the 13 days the S&P 500 fell.
Hotel stocks just checked in at record highs.
Marriott $MAR is up 18.5% and Hilton $HLT is up 17.7% since the S&P 500's last record on October 6. Both closed at all-time highs yesterday.
Over the same stretch, Nvidia $NVDA is down 29.4% and chip stocks are down 24.4%.
Marriott rose on 8 of the 13 days the S&P 500 fell.
"This group best nailed it in early-2025, and did OK this year too, but informatively; they got it quite wrong in the big picture headed into 2022."
@Callum_Thomas@topdowncharts
A month ago $CRWV bonds were priced like it was going bankrupt. Last Thursday it fell 10% to a 52-week low. Nobody wanted to touch it.
Wild how fast that turns.
Natural gas is up 15% since Election Day.
So why are the companies that produce it down?
Data centers run on electricity, and natural gas generates about 40% of U.S. power. The EIA found that most of the extra power data centers need would come from running gas plants harder. That makes data centers a major part of the long-term case for gas.
Last week, voters passed restrictions on data centers in almost every local measure on the ballot.
Natural gas is up 15% since Election Day.
So why are the companies that produce it down?
Data centers run on electricity, and natural gas generates about 40% of U.S. power. The EIA found that most of the extra power data centers need would come from running gas plants harder. That makes data centers a major part of the long-term case for gas.
Last week, voters passed restrictions on data centers in almost every local measure on the ballot.
Tariffs. Then AI eating software. Then the Strait of Hormuz. Then OpenAI's revenue. Then $116 oil. Then Democrats and Data Centers. Then the Jensen headlines.
Today it's back to bonds after a hot CPI.
Attention follows price movement.