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Here are five things you must know for Wednesday, Oct. 5:

1. -- U.S. stock futures suggested Wall Street would open lower Wednesday and European shares declined on worries the European Central Bank may be moving toward tighter monetary policy.

The British pound, which fell to a 31-year low on Tuesday, was down a further 0.2% against the dollar at $1.2704. Gold prices rebounded, up 0.37% to $1,274.30 an ounce on Wednesday, after plunging to a three-month low during the previous session as the dollar strengthened and the likelihood of an interest rate increase from the Federal Reserve this year intensified. 

Oil prices rose 1.64% early Wednesday to $49.49 a barrel. West Texas Intermediate crude oil closed 0.25% lower on Tuesday. 

The economic calendar in the U.S. on Wednesday includes the ADP National Employment Report at 8:15 a.m. EDT, International Trade for August at 8:30 a.m., Factory Orders for August at 10 a.m., and the ISM Non-Manufacturing Index for September at 10 a.m.

Richmond Federal Reserve President Jeffrey M. Lacker will present a speech -- "Does Federal Reserve Governance Need Reform?" -- at Marshall University in Huntington, W.Va.

Earnings are expected Wednesday from Yum! Brands (YUM) - Get Report , Constellation Brands (STZ) - Get Report and Monsanto (MON) .

2. -- Despite a high amount of crosstalk, the vice presidential debate between Donald Trump's running mate, Indiana Gov. Mike Pence, and Hillary Clinton's running mate, Virginia Sen. Tim Kaine, was a relatively civil one, at times even polite, especially in comparison to the presidential showdown the week before.

During the debate, Kaine, however, aggressively challenged Pence over a long list of Donald Trump's controversial positions and statements Tuesday night, drawing a vigorous defense of Trump's tax history. But Pence sidestepped criticism of Trump's demeaning comments about women, his public doubting of Barack Obama's citizenship and broader questions about his temperament.

Pence and Kaine faced off for 90 minutes Tuesday night in the only vice presidential debate of the campaign.

The two vice presidential candidates found common ground in a discussion on law enforcement and race relations. "At the risk of agreeing with you, community policing is a great idea," Pence said in one exchange with Kaine.

3. -- Twitter (TWTR) - Get Report  is expected to field bids this week, and Salesforce.com's (CRM) - Get Report  Marc Benioff has been trying to build the case that his company should be the buyer, The Wall Street Journal reported, citing people familiar with the matter.

Benioff is looking to make a splashy acquisition that would secure for Salesforce a treasure trove of data as well as a prized consumer brand, the people told the Journal.

Alphabet's (GOOGL) - Get Report  Google may also place a bid, the people said, while Walt Disney (DIS) - Get Report has been considering its own offer, the Journal reported.

Alphabet is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells GOOGL? Learn more now.

Twitter could cost upwards of $20 billion, according to the Journal report.

4. -- The scandal over improper sales practices at Wells Fargo (WFC) - Get Report extended to thousands of small-business owners, according to a U.S. lawmaker, Reuters reported.

In a Sept. 29 letter viewed by Reuters, Sen. David Vitter, a Louisiana Republican, demanded that Wells Fargo CEO John Stumpf provide a "full accounting" of customers affected. Vitter is a member of the U.S. Senate's banking committee and also heads its small business committee.

Discussions between congressional staffers and Wells Fargo "have indicated that the fraudulent activity of your employees was not limited to Wells Fargo's consumer banking operations," Vitter wrote. "Thousands of small business owners were impacted by this fraud."

A person familiar with Vitter's probe said Wells Fargo has identified about 10,000 small business accounts that were subject to improper practice, Reuters reported.

Separately, Fitch Ratings on Tuesday cut the outlook to "negative" for Wells Fargo's credit ratings, citing the bank's troubles with the unauthorized customer accounts.

Wells Fargo is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells WFC? Learn more now.

5. -- Japanese insurer Sompo agreed to pay $6.3 billion for Bermuda's Endurance Specialty (ENH) in its biggest move yet to boost the proportion of business coming from outside its home market.

The agreement comes as Hurricane Matthew, a Category Four hurricane, prepares to hit Florida after pounding Haiti, raising the prospect of multi-billion-dollar claims against insurers. The hurricane is said to be the most powerful in a decade.

Endurance Specialty offers both insurance and reinsurance, including global weather, marine and casualty products.

Sompo said it will pay $93 a share for Endurance, which is a 5.8% premium to Tuesday's closing price of $87.87 after Endurance rose more than 35% on expectations that a bid was coming. The price is a 40.3% premium to Endurance's undisturbed share price as of Monday.