Thirty-nine years ago today the Dow Jones Industrial Average fell 22.6% in one session, a single-day record that still stands, erasing roughly $500 billion of US equity value, according to Bitcoin.com News. October 19 lands on a Monday again this year, and the setup going in was uneasy. The S&P 500 closed Friday at 7,659.44, down 1.09%, the Nasdaq Composite lost about 2.2%, CoreWeave dropped nearly 12%, and the Cboe Volatility Index, or VIX, climbed toward 20. Oil added to the strain, with West Texas Intermediate above $100 a barrel and Brent near $110, on top of a 3.7% September consumer price index reading, while gold held around $4,150 to $4,200 an ounce. Bitcoin spent the weekend between roughly $80,400 and $81,000, and on Monday CoinDesk's front page showed it at $82,398.62, up 0.98%, with ether at $2,419.05, up 0.53%. A CoinDesk headline the same day said options and bitcoin trades suggested Friday's Wall Street selloff might not carry into Monday. The plumbing has also changed since 1987: market-wide circuit breakers now pause trading at S&P 500 declines of 7% and 13%, and a 20% fall closes the market for the rest of the session.