monthly · indexed (100 = shared start)

S&P 500 vs the Fed balance sheet

How do stock prices move against the size of the Federal Reserve's balance sheet?

Data through July 2026
-500.00.00500.01,0001,500Dec 2002Sep 2007May 2012Feb 2017Oct 2021Jul 2026
S&P 500 (SPY)
Fed total assets
S&P 500 vs the Fed balance sheet: summary statistics (Max range)
SeriesFirstLatestMinMax
S&P 500 (SPY)100.01274.593.61274.5
Fed total assets100.0928.399.41233.1
Source:Federal Reserve Economic Data (FRED) and Yahoo FinanceSPYWALCL· Data may be revised by the source.
  • Latest chart point (2026-07-01) predates the newest source observation (2026-07-24); one input series may be lagging.

FormulaIndex SPY and WALCL (both monthly avg) to 100 at the shared start
Methodology

SPDR S&P 500 ETF (SPY, daily adjusted close, Yahoo Finance) and total Federal Reserve assets (WALCL, weekly, millions of dollars, FRED), both rebased to 100 at their shared start. Both are averaged to monthly so the lines share an axis. QE expands WALCL; a tight pairing between the lines is often read as 'liquidity-driven' equity markets, though the correlation is not causal. SPY's adjusted close reflects total return.

Freshness
Data through
July 2026
Last refreshed
24 Jul 2026
Native frequency
monthly

The site is refreshed separately from the source. Data through = the latest observation published by FRED and Yahoo Finance; last refreshed = when PIER20 last fetched the file.

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