The Dow Jones Industrial Average (DJI) jumped to record highs, with investor sentiment boosted by COVID-19 vaccine optimism and hopes of lawmakers nearing an agreement on additional fiscal stimulus. At last check, the blue-chip index is up nearly 100 points, after Reuters reported that a bipartisan stimulus plan had a chance to be introduced as soon as today. To improve its chance of passing, the $908 billion plan would be split into two parts, with $748 billion going toward jobless and small business while another part would go toward the controversial measures including liability protections and state aid.

Elsewhere, the S&P 500 Index (SPX) and Nasdaq Composite (IXIC) are higher as well, after the U.S. began shipping out doses of Pfizer (PFE) and BioNTech's (BNTX) coronavirus vaccine. Additionally, Moderna's (MRNA) vaccine candidate is slated to be assessed by the Food and Drug Administration (FDA) this week.

Continue reading for more on today's market, including:

• Tesla is set to join 2 new indexes on Friday.
• How did AES' dividend news help the stock today?
• Plus, Dropbox is seeing a surge in options volume; one financial stock that notched a bull note; and more on AMC's continuing struggles.

Dropbox Inc (NASDAQ:DBX) is one stock seeing a surge in options activity today, though the catalyst remains unclear. The equity was last seen up 4.5% to trade at $23.51, and so far today, 58,000 calls and 6,141 puts have already crossed the tape -- six times the intraday average and volume pacing in the 100th percentile of its annual range. Most popular by far is the December 24 call, followed by the 25 call from the same series, with new positions being opened at both. Longer term, Dropbox stock has tacked on 31% year-to-date.

Meanwhile, one stock surging on the New York Stock Exchange (NYSE) today is Silvergate Capital Corp (NYSE:SI), last seen up 9% at $43.00, after landing a price-target hike to $50 from $26 at Compass Point. In response, SI is now well on its way to recapture its Dec. 7 all-time high of $45.50, and year-over-year has added 168.3%.

At the other end of the NYSE, AMC Entertainment Holdings Inc (NYSE:AMC) is down 15.8% to trade at $3.30. The pandemic has been unkind to plenty of industries this year, and movie theaters are a big part of that group. AMC is off 55.4% in 2020, and following today's drop looks poised to face overhead pressure at its 20-day moving average.

Stocks are a mixed bag midday, with fiscal stimulus talks seemingly going nowhere while recently released data showed jobless claims rose more than Wall Street anticipated. The Dow Jones Industrial Average (DJI) is down around 40 points, the S&P 500 Index (SPX) is flat, while the Nasdaq Composite (IXIC) is modestly higher thanks to a tech sector rally.

As daily coronavirus deaths surpass 3,000 in the U.S., upcoming Christmas travel plans have become a hot-button issue, while all eyes are on the Food and Drug Administration's (FDA) meeting later today on the Pfizer-BioNTech vaccine. Elsewhere, the European Central Bank (ECB) voted to expand its stimulus program by 500 billion euros.

Continue reading for more on today's market, including:

• A $200 million SEC fine is spoiling GE's chances to soar.
• Is now the right time to buy Spirit Airlines stock?
• Plus, Starbucks calls flying off the shelves; new highs for Tenet Healthcare stock; and the cause for Fisker stock's plunge today.

One stock seeing notable options activity today is Starbucks Corporation (NYSE:SBUX), which was last seen up 4.4% to trade at $104.83, after the company predicted a strong 2021 rebound. So far today, 48,000 calls have already crossed the tape -- five times the intraday average and volume pacing in the 99th percentile of its annual range -- versus 13,000 puts. Most popular by far is the weekly 12/11 105-strike call, followed by the 104-strike call from the same series, with new positions opening at both. Longer term, Starbucks stock has tacked on 69.2% in the last nine months.

Meanwhile, one stock surging on the New York Stock Exchange (NYSE) today is Tenet Healthcare Corp (NYSE:THC), last seen up 16.2% at $40.64,after it was announced that the company is set to acquire a portfolio of up to 45 ambulatory surgery centers in a $1.1 billion cash deal. The equity scored a new five-year high of $41.65 out of the gate, with the 30-day moving average catching pullbacks from earlier in the month.

At the other end of the NYSE, Fisker Inc (NYSE:FSR) is down 8.8% to trade at $15.30, after the company's CEO announced the design of his next vehicle, and Wolfe Research initiated coverage with a "sell" rating. FSR is now trading at its lowest level since early November, but still boasts a 51.6% rise in 2020.