(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * Clorox rises after strongest sales growth in 2 decades * Nielsen up on plans to sell unit for $2.7 bln * Tech mega-caps bounce from steep selloff on Friday * Indexes up: Dow 1.7%, S&P 1.3%, Nasdaq 0.4% (Updates to early afternoon) Nov 2 (Reuters) - Wall Street’s major indexes gained ground on Monday after suffering their worst week since March, as investors geared up for an event-packed week centered around the U.S. presidential election. Market participants expect short-term trading turmoil and major long-term policy shifts related to taxes, government spending, trade and regulation depending on whether President Donald Trump or his Democratic challenger Joe Biden wins the White House race. Biden is ahead in national opinion polls, but races are tight in battleground states that could tip the election to Trump. Analysts said the outcome most likely to shake equity markets in the near term would be no immediate winner at all on Tuesday night. “Traders are trying to position themselves to the idea that just having a result will be good for the market,” said Rick Meckler, a partner at Cherry Lane Investments in New Vernon, New Jersey. Investors betting on a Biden administration, which is expected to deliver a massive fiscal stimulus and promote green energy, have fueled a rally in solar stocks, industrials and small-cap names in recent weeks. On the other hand, JP Morgan has listed Bank of America , Wells Fargo and Citigroup in its “Trump basket” of stocks. The S&P banks index added 1.7%. “No matter what happens tomorrow, it will be the impetus to get the stimulus done in coming weeks after the election is decided,” said Thomas Hayes, managing member at Great Hill Capital LLC in New York. Energy, materials and industrials enjoyed the sharpest percentage gains among major S&P sectors. Value stocks, which tend to outperform growth coming out of a recession, also got a lift. The Russell 1000 value index rose about 2%, while the Russell 1000 growth index added about 0.5%. The S&P 500 ended a turbulent week at near six-week lows on Friday after quarterly reports from technology mega-caps failed to impress and on surging coronavirus cases in the United States and Europe. The CBOE volatility index, known as Wall Street’s fear gauge, inched lower on Monday after ratcheting up to near four-month highs last week. Focus this week will also be on the Federal Reserve’s two-day policy meeting, the monthly jobs report and earnings from about a quarter of the S&P 500 companies. At 12:29 p.m. ET the Dow Jones Industrial Average rose 454.01 points, or 1.71% to 26,955.61, the S&P 500 gained 44.00 points, or 1.35% to 3,313.96 and the Nasdaq Composite gained 48.06 points, or 0.44% to 10,959.65. Clorox Co gained 5% after reporting its strongest quarterly sales growth in more than two decades and raising its full-year revenue forecast. Market research firm Nielsen Holdings Plc gained 5.7% on plans to sell its consumer goods data unit for $2.7 billion to private equity firm Advent International. The S&P airlines index fell 1.9%, while cruise operators Carnival Corp and Norwegian Cruise Line Holdings Ltd shed 2% and 3.5% respectively, reflecting fears over a relentless surge in COVID-19 cases. Advancing issues outnumbered declining ones on the NYSE by a 3.8-to-1 ratio. On the Nasdaq, a 2.5-to-1 ratio favored advancers. The S&P 500 posted five new 52-week highs and two new lows; the Nasdaq Composite recorded 25 new highs and 32 new lows. (Reporting by Medha Singh and Shivani Kumaresan in Bengaluru; Editing by Anil D’Silva and Maju Samuel)