Although the U.S. government officially shut down on October 1, after Democrats and Republicans failed to agree on funding, the stock market showed little concern, posting solid gains on the first trading day of the month.Some investors wryly noted that “no data means no bad data.” The suspension of key economic releases such as jobs and CPI could temporarily remove negative catalysts from the market.Historically, government shutdowns have had limited market impact, typically lasting less than two weeks. While most investors remain unfazed, a few caution that if the Trump administration follows through on its threat to lay off large numbers of federal employees, or if the shutdown drags on longer than expected, the economic damage could escalate.Bank of America compiled historical data sho