The S&P 500 has risen during every government shutdown since 1990. Michael Nagle / Bloomberg via Getty Images Close Key Takeaways The federal government just shut down for the first time in six years, and the stock market—characteristically—took it in stride. But could that change? The benchmark S&P 500 was up 0.3% on Wednesday afternoon. (Follow Investopedia's live markets coverage here.) The muted response was no surprise to market watchers: Government shutdowns may be dramatic, but they haven't been a ma ...