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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 12 July 2025

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American exceptionalism often turns out to be the heuristic rule of thumb for better economic growth, low and stable inflation, full employment, and macro-financial stability.

Apple Boston

2026-07-01 11:29:00 Wednesday ET

American exceptionalism often turns out to be the heuristic rule of thumb for better economic growth, low and stable inflation, full employment, and macro-financial stability.

In recent years, higher American economic growth has been impressive both by historical standards and in comparison to the rest of the world. American excep

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House of Representatives considers a government expenditure bill with border wall finance and so sets up a shutdown stalemate with Senate.

Laura Hermes

2018-12-23 13:39:00 Sunday ET

House of Representatives considers a government expenditure bill with border wall finance and so sets up a shutdown stalemate with Senate.

The House of Representatives considers a government expenditure bill with border wall finance and therefore sets up a shutdown stalemate with Senate. As fre

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Mark Granovetter follows the key principles of modern economic sociology to analyze social relations and economic phenomena.

Charlene Vos

2023-02-21 08:27:00 Tuesday ET

Mark Granovetter follows the key principles of modern economic sociology to analyze social relations and economic phenomena.

Mark Granovetter follows the key principles of modern economic sociology to analyze social relations and economic phenomena. Mark Granovetter (2017) &

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Admitting China to the WTO seems ineffective in imparting economic freedom and democracy to the communist regime.

Dan Rochefort

2018-07-27 10:35:00 Friday ET

Admitting China to the WTO seems ineffective in imparting economic freedom and democracy to the communist regime.

Admitting China to the World Trade Organization (WTO) and other international activities seems ineffective in imparting economic freedom and democracy to th

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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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Can the Chinese renminbi become the next dual global reserve currency in addition to the American dollar?

Daphne Basel

2020-08-01 07:28:00 Saturday ET

Can the Chinese renminbi become the next dual global reserve currency in addition to the American dollar?

Technological advances, geopolitical risks, and pandemic outbreaks cannot shake investor confidence in the American dollar as the global reserve currency.

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