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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 17 January 2026

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Global debt surges to $250 trillion in the fiscal year 2019.

Olivia London

2019-12-28 09:36:00 Saturday ET

Global debt surges to $250 trillion in the fiscal year 2019.

Global debt surges to $250 trillion in the fiscal year 2019. The International Institute of Finance analytic report shows that both China and the U.S. accou

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Mark Zuckerberg develops Facebook as a social network platform to help empower global connections among family and friends.

Amy Hamilton

2020-02-12 09:31:00 Wednesday ET

Mark Zuckerberg develops Facebook as a social network platform to help empower global connections among family and friends.

Mark Zuckerberg develops Facebook as a social network platform to help empower global connections among family and friends. David Kirkpatrick (2011) T

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Michel De Vroey delves into the global history of macroeconomic theories from real business cycles to persistent monetary effects.

Laura Hermes

2023-02-07 08:26:00 Tuesday ET

Michel De Vroey delves into the global history of macroeconomic theories from real business cycles to persistent monetary effects.

Michel De Vroey delves into the global history of macroeconomic theories from real business cycles to persistent monetary effects. Michel De Vroey (2016)

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Harvard financial economist Alberto Cavallo empirically shows the recent *Amazon effect* of faster retail price adjustments.

Amy Hamilton

2018-08-23 11:34:00 Thursday ET

Harvard financial economist Alberto Cavallo empirically shows the recent *Amazon effect* of faster retail price adjustments.

Harvard financial economist Alberto Cavallo empirically shows the recent *Amazon effect* that online retailers such as Amazon, Alibaba, and eBay etc use fas

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Chinese President Xi JingPing calls President Trump to reach Sino-American trade conflict resolution.

Monica McNeil

2019-01-04 11:41:00 Friday ET

Chinese President Xi JingPing calls President Trump to reach Sino-American trade conflict resolution.

Chinese President Xi JingPing calls President Trump to reach Sino-American trade conflict resolution. Xi sends a congratulatory message to mark 40 years sin

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The global market for GLP-1 weight-loss medications can grow substantially to benefit more than 1 billion people worldwide by 2030.

Monica McNeil

2025-10-31 12:26:00 Friday ET

The global market for GLP-1 weight-loss medications can grow substantially to benefit more than 1 billion people worldwide by 2030.

With respect to wider weight loss treatment and obesity treatment, the global market for GLP-1 medications now grows substantially to benefit more than 1 bi

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