Tech giants, Warren Buffett's empire, and the 'Generals': Here's what to look for when these 6 companies report earnings this week

General Motors' third quarter was dominated by a month-long strike involving about 48,000 workers. Some analysts viewed the event as a way for the automaker to clear away stockpiled inventory, but as the demonstration lasted longer than first expected, some found it could cost GM more than $1 billion.

The earnings report and subsequent analyst call is sure to address the new deals inked between United Auto Workers and GM, as well as how the strike affected third-quarter revenue. Investors will want reassurance that the company won't be threatened by another demonstration, and that it can ramp up production fast enough to gain back the efficiency lost through late September and early October.

Here are Wall Street's quarterly estimates heading into the week:

• Revenue: estimated $35.73 billion, versus $35.79 billion in the year-ago period
• Adjusted earnings per share: estimated $1.29, versus $1.87 in the year-ago period

Apple took back the crown as the world's most valuable company earlier in October, and with shares hitting record highs in recent days, the tech giant's next earnings report can either sour investors' rosy sentiment or send its valuation even higher.

Analysts are likely to focus on iPhone 11 sales, as many reports indicate demand for the phone at higher levels than first expected. The report also arrives just days before the release of Apple TV+, so any guidance on how quickly it will grow subscribers or how much the company is budgeting for original content could grab headlines.

Finally, the report should detail whether Apple's bet on its Services business continues to thrive or is beginning to fizzle out. The company is relying more on its service offerings to drive revenue as the iPhone upgrade cycle lengthens, so any drop in growth could spell disaster for the record share price.

Here are Wall Street's quarterly estimates heading into the week:

• Revenue: estimated $53.36 billion, versus $53.27 billion in the year-ago period
• Adjusted earnings per share: estimated $2.10, versus $2.30 in the year-ago period

Warren Buffett's holding company has been blighted in recent months by Kraft Heinz's lagging performance and the loss of one of Buffett's top proteges. Analysts will look forward to any news on a potential increase to Berkshire's stake in Bank of America, as well as any updates on how Buffett wants to spend Berkshire's massive cash pile.

Berkshire is also relatively unique in that its operating earnings figure is far more relevant than earnings per share. Since the company has to calculate gains and losses from its hefty stock positions into its earnings figure, per-share earnings can drop significantly even when Berkshire isn't necessarily losing money.

Investors will want to see that Berkshire's operating profit remains strong and that income produced by its various businesses isn't slowing in the wake of recession warnings and trade war escalations.

Here are Wall Street's quarterly estimates heading into the week:

• Revenue: estimated $66.47 billion, versus $63.45 billion in the year-ago period
• FILL IN OPERATING PROFIT/MARGINS

Hot off Mark Zuckerberg's congressional testimony related to the company's Libra currency, Facebook will want to appeal to investors with steady growth in ad revenue, strong user retention, and success in spinoff products like its new dating service.

The company is also still haunted by past and potential lawsuits related to user privacy and anti-trust issues. Though the report may not offer any new details as to how Facebook plans to combat these cases, analysts are sure to ask about them in the earnings call.

The Libra project has also lost several key collaborators in the last few weeks, so any mention of a project delay, overhaul, or even complete scrapping would likely harm the company's share price. Facebook may even unveil details on how it'll work with the US government to release the crypto-coin, which may soothe regulation-based fears.

Here are Wall Street's quarterly estimates heading into the week:

• Revenue: estimated $17.34 billion, versus $13.72 billion in the year-ago period
• Adjusted earnings per share: estimated $2.25, versus $2.07 in the year-ago period

Once a behemoth of US industry, GE is in the midst of a massive overhaul as it seeks to cut costs and focus its investments on a few key businesses. Investors aren't yet sure the strategy will work, as GE stock is still down significantly from its early-2000 highs. Most will be interested in hearing things are going as planned, and that the shifted priorities aren't harming quarterly profits.

The company is also still reeling from an August report that alleged GE is committing Enron-like fraud. Any update on the matter, as well as detailed rebuttals to some of the claims, could reassure analysts the company is in fine shape.

Finally, GE's previous guidance set its cash flow as arriving between negative $1 billion and positive $1 billion in the third quarter. Though the company's market cap of $78 billion dwarfs the projection, the result will be watched closely.

Here are Wall Street's quarterly estimates heading into the week:

• Revenue: estimated $26.52 billion, versus $29.57 billion in the year-ago period
• Adjusted earnings per share: estimated 12 cents, versus 14 cents in the year-ago period