New York-Based Altaba Reports Total US Federal Income Tax Debt Forgiveness Due to the Trump Tax Cuts Act of $11.6 Bil in Its Short Period 2017 Operating Results ....................................................................................... So To Simplify What Happened Here, Chinese Giant Technology Co Alibaba Group's Stock Market Price Goes Up More Than Tenfold and US Taxpayers Are Required To Pay $11 Bil to Altaba For This Because of the Trump Tax Cuts Act: What a Deal For US Taxpayers! ....................................................................................... And So the Trump Tax Cuts Act Gives an $11 Bil US Tax Break to Investors in China's Largest Technology Company Alibaba Group, But It Flat Out Crushes Nearly Every US Technology Company

All of the below information comes from Altaba, Inc's just released 2017 N-CSR Certified Shareholder Report Filed with the US SEC.

"Altaba Inc. (“Altaba” or the “Fund”) is a publicly traded, non-diversified, closed-end management investment company registered under the Investment Company Act of 1940 (“1940 Act”). The Fund is organized as a Delaware corporation. The Fund’s common stock is listed on The NASDAQ Global Select Market (“Nasdaq”) under the ticker symbol “AABA”.

On June 13, 2017, Yahoo! Inc. (“Yahoo”) completed the sale of its operating business to Verizon Communications Inc. On June 16, 2017 (the “Inception Date”), Yahoo changed its name to “Altaba Inc.” and filed a Notification of Registration on Form N-8A and a Registration Statement on Form N-2 with the Securities and Exchange Commission (the “SEC”) in order to register as an investment company under the 1940 Act."

New York-Based Altaba Inc's 2017 financial statements are as of Dec 31, 2017 and for the six and a half month period from June 16, 2017 to Dec 31, 2017.

Altaba had Total Assets of $81.2 Bil at Dec 31, 2017 with its Investment in the Common Stock of the Alibaba Group comprising 81.4% of it, or $66.1 Bil.

For the Period from June 17, 2017 to Dec 31, 2017, Altaba reported a bottom-line Net Increase in Net Assets Resulting From Operations of a massive $20.6 Bil.

Altaba is considered a regular C Corp for US Federal Income Tax purposes and thus is impacted by the Trump Tax Cuts Act ..... and boy is it ever.

Just like Warren Buffett's Berkshire Hathaway, Altaba has huge Common Stock Investments which have appreciated in value dramatically.  To illustrate this point, Altaba's Investment in Alibaba Group has a Cost of roughly $5 Bil and a Fair Market Value of $66.1 Bil at Dec 31, 2017.

Since President Trump signed the Trump Tax Cuts Act on Dec 22, 2017, that is when both Berkshire Hathaway's and Altaba's huge Deferred US Federal Income Tax Liabilities Related to Its Unrealized Appreciation in Investments are written down by 40% from 35% to 21% and thus this US Federal Income Tax Debt is in essence forgiven by the Trump Tax Cuts Acts with a like amount also being reflected in both Berkshire Hathaway's and Altaba's operating results for the period.

The end result is that Altaba included in its Net Increase in Net Assets Resulting From Operations US Federal Income Tax Debt Forgiveness of a Total of 11.6 Bil for the period from June 16, 2017 to Dec 31, 2017 ...... not as large as Berkshire Hathaway's $29.6 Bil, but still pretty healthy.