President Trump’s declaration of a national emergency provided some much-needed relief to Apple’s stock price just before the market closed this afternoon.

Apple shares jumped up over $20 in value during the last 30 minutes of trading today, just after President Trump announced that the U.S. government will free up $50 billion in federal resources to combat the COVID-19 outbreak.

The Dow Jones Industrial Average measures the strength of American industry based upon how 30 large, publicly owned companies in the United States have traded in the stock markets. Companies come in and out the Dow periodically, according to whether their fortunes are waxing or waning.

When Apple joins the Dow Jones Industrial Average next week — replacing AT&T, which has been on the index since 1916 — the Dow will be at a historic high (assuming nothing catastrophic happens between now and then). But if Apple had joined the Dow in 2008, that value would be even more historic. It would have added more than 4,300 points to the Dow.

AAPL shares have dropped below $400 in early morning trading on Monday. The DOW and NASDAQ both opened to big losses as they dropped 220 points and 53 points.

The share price drop may also be due in part to a report this morning that Apple has significantly reduced iPhone orders for the remainder of 2013. AAPL shares dropped below $400 in April for the first time in over 16 months.