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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 14 February 2026

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Janet Yellen worries about U.S. government debt accumulation, expects new interest rate increases, and warns of the next economic recession.

Amy Hamilton

2018-11-05 10:40:00 Monday ET

Janet Yellen worries about U.S. government debt accumulation, expects new interest rate increases, and warns of the next economic recession.

Former Fed Chair Janet Yellen worries about U.S. government debt accumulation, expects new interest rate increases, and warns of the next economic recession

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Treasury Secretary Steven Mnuchin welcomes a weak U.S. dollar amid pervasive fears of an open trade war between America and China.

James Campbell

2018-01-15 07:35:00 Monday ET

Treasury Secretary Steven Mnuchin welcomes a weak U.S. dollar amid pervasive fears of an open trade war between America and China.

Treasury Secretary Steven Mnuchin welcomes a weak U.S. dollar amid pervasive fears of an open trade war between America and China. At the World Economic For

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Citron Research short-sellers initiate a class-action lawsuit against Tesla and its executive chairman Elon Musk.

Monica McNeil

2018-09-05 08:34:00 Wednesday ET

Citron Research short-sellers initiate a class-action lawsuit against Tesla and its executive chairman Elon Musk.

Citron Research short-sellers initiate a class-action lawsuit against Tesla and its executive chairman Elon Musk because he might have deliberately orchestr

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The new Brexit deal can boost British pound appreciation and macroeconomic optimism.

Fiona Sydney

2019-11-13 11:34:00 Wednesday ET

The new Brexit deal can boost British pound appreciation and macroeconomic optimism.

The new Brexit deal can boost British pound appreciation and economic optimism. British prime minister Boris Johnson wins the parliamentary vote on his new

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Calomiris and Haber delve into the comparative analysis of bank crises and politics in America, Britain, Canada, Mexico, and Brazil.

Dan Rochefort

2023-04-14 13:32:00 Friday ET

Calomiris and Haber delve into the comparative analysis of bank crises and politics in America, Britain, Canada, Mexico, and Brazil.

Calomiris and Haber delve into the comparative analysis of bank crises and politics in America, Britain, Canada, Mexico, and Brazil. Charles Calomiris an

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Stock Synopsis: With a new Python program, we use, adapt, apply, and leverage each of the mainstream Gemini Gen AI models to conduct this comprehensive fundamental analysis of T-Mobile (U.S. stock symbol: $TMUS).

James Campbell

2025-10-06 10:27:00 Monday ET

Stock Synopsis: With a new Python program, we use, adapt, apply, and leverage each of the mainstream Gemini Gen AI models to conduct this comprehensive fundamental analysis of T-Mobile (U.S. stock symbol: $TMUS).

Stock Synopsis: With a new Python program, we use, adapt, apply, and leverage each of the mainstream Gemini Gen AI models to conduct this comprehensive fund

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