Here are the most important news, trends and analysis that investors need to start their trading day:1. Dow futures shoot up, turn positive after key inflation dataA statue of George Washington is pictured in front of the New York Stock Exchange on Wall Street in New York City.Johannes Eisele | AFP | Getty Images2. Apple to hold launch event, releases iOS security patchApple CEO Tim Cook speaks during a special event at the company’s headquarters of Apple Park in a still image from video taken in Cupertino, California, U.S. September 15, 2020.Apple Inc. | ReutersApple is holding its annual iPhone event Tuesday, the company’s seventh straight virtual launch due to the pandemic. The tech giant is expected to introduce new iPhones and updates to its AirPods and Apple Watch, according to analysts. New iPads and MacBooks Pro laptops are due for an update, too, though it’s unclear whether Apple will pack all of its fall launches into one or spread them out.Apple has issued a patch to iOS, its mobile operating system, to fix a vulnerability related to the iPhone’s iMessage function. An Israeli firm had been exploiting the weakness since February, according to research group Citizen Lab. The company, NSO Group, did not confirm or deny responsibility. The FBI and Israeli officials have been investigating NSO.3. Cathie Wood foresees big gains for Tesla, digital currencies Cathie Wood, founder and CEO of ARK Investment Management LLC, speaks during the Skybridge Capital SALT New York 2021 conference in New York, September 13, 2021.Brendan McDermid | ReutersArk Invest’s Cathie Wood, the popular investor who focuses on disruptive innovation, made bullish calls Monday evening on Tesla and cryptocurrencies at the annual SALT conference. Asked about her recent trimming of her Tesla stake, Wood said it was a technical move and the electric vehicle maker still accounts for more than 10% of Ark’s flagship fund. Wood has grown increasingly bullish on ether, saying her crypto portfolio now consists of 40% in the world’s second largest digital coin and 60% bitcoin.4. SEC chairman to face questions about crypto regulationsGary Gensler, chairman of the Commodity Futures Trading Commission (CFTC), listens during a Financial Stability Oversight Council (FSOC) meeting at the U.S. Treasury in Washington, D.C., U.S., on Monday, Dec. 9, 2013.Andrew Harrer | Bloomberg | Getty Images5. House Democrats propose tax hikes to pay for $3.5 trillion billSpeaker of the House Nancy Pelosi and House Ways and Means Committee Chairman Richard Neal (L), Democrat of Massachusetts, speaks about the US – Mexico – Canada Agreement, known as the USMCA, on Capitol Hill in Washington, DC, December 10, 2019.Saul Loeb | AFP | Getty ImagesHouse Democrats outlined tax increases they aim to use to offset up to $3.5 trillion in spending on the social safety net and climate policy. The proposal includes top corporate and individual tax rates of 26.5% and 39.6%, respectively. The tax plans could change as Democrats try to craft and pass a final bill in coming weeks. The proposal also includes a 3% surcharge on individual income above $5 million and a capital gains tax of 25%.— Reuters contributed to this report. Follow all the market action like a pro on CNBC Pro. Get the latest on the pandemic with CNBC’s coronavirus coverage.