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Tortoise Acquisition Corp. (NYSE:SHLL)

Real-time price： | Most recent change：0.00%

Tortoise Acquisition Corp. is a blank check company. It aims to acquire one or more businesses and assets, via a merger, capital stock exchange, asset acquisition, stock purchase or reorganization. Tortoise Acquisition Corp. is based in New York, United States....

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Here we provide our AYA proprietary alpha stock signals for all premium members on our AYA fintech network platform. Specifically, a high Fama-French multi-factor dynamic conditional alpha suggests that the stock is likely to consistently outperform the broader stock market benchmarks such as S&P 500, Dow Jones, Nasdaq, Russell 3000, MSCI USA, and MSCI World etc. Since March 2023, our proprietary alpha stock signals retain U.S. Patent and Trademark Office (USPTO) fintech patent protection, approval, and accreditation for 20 years. Our homepage and blog articles provide more details on this proprietary alpha stock market investment model with robust long-term historical backtest evidence.

Sharpe-Lintner-Black CAPM alpha (Premium Members Only) Fama-French (1993) 3-factor alpha (Premium Members Only) Fama-French-Carhart 4-factor alpha (Premium Members Only) Fama-French (2015) 5-factor alpha (Premium Members Only) Fama-French-Carhart 6-factor alpha (Premium Members Only) Dynamic conditional 6-factor alpha (Premium Members Only) Last update: Saturday 22 November 2025

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U.K. prime minister Boris Johnson encounters Brexit defeat during his new premiership.

Chanel Holden

2019-10-15 09:13:00 Tuesday ET

U.K. prime minister Boris Johnson encounters Brexit defeat during his new premiership.

U.K. prime minister Boris Johnson encounters defeat during his new premiership. The first major vote would pave the path of least resistance to passing a no

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Lyft seeks to go public with a dual-class stock ownership structure that allows the co-founders to retain significant influence.

Amy Hamilton

2019-03-11 10:32:00 Monday ET

Lyft seeks to go public with a dual-class stock ownership structure that allows the co-founders to retain significant influence.

Lyft seeks to go public with a dual-class stock ownership structure that allows the co-founders to retain significant influence over the rideshare tech unic

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The Federal Communications Commission (FCC) considers its majority vote to dismantle net neutrality rules.

John Fourier

2017-12-13 06:39:00 Wednesday ET

The Federal Communications Commission (FCC) considers its majority vote to dismantle net neutrality rules.

The Federal Communications Commission (FCC) has decided its majority vote to dismantle rules and regulations of most Internet service providers (ISPs) that

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President Trump tweets his key decision to oust State Secretary Rex Tillerson due to intense disagreement over diplomatic affairs.

Fiona Sydney

2018-03-07 07:34:00 Wednesday ET

President Trump tweets his key decision to oust State Secretary Rex Tillerson due to intense disagreement over diplomatic affairs.

President Trump tweets his key decision to oust State Secretary Rex Tillerson after several months of intense disagreement over diplomatic affairs. Trump so

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Former Fed Chair Alan Greenspan discerns asset bubbles in the American stock and bond markets in early-2018.

Jonah Whanau

2018-01-21 07:25:00 Sunday ET

Former Fed Chair Alan Greenspan discerns asset bubbles in the American stock and bond markets in early-2018.

As he refrains from using the memorable phrase *irrational exuberance* to assess bullish investor sentiments, former Fed chairman Alan Greenspan discerns as

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Warren Buffett points out that many people misunderstand his stock investment method in several ways.

Jonah Whanau

2017-06-21 05:36:00 Wednesday ET

Warren Buffett points out that many people misunderstand his stock investment method in several ways.

In his latest Berkshire Hathaway annual letter to shareholders, Warren Buffett points out that many people misunderstand his stock investment method in seve

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