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....

+See More


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 2 May 2026

Blog+More

President Trump meets Chinese President Xi for better economic reforms.

Rose Prince

2017-03-21 09:37:00 Tuesday ET

President Trump meets Chinese President Xi for better economic reforms.

Trump and Xi meet in the most important summit on earth this year. Trump has promised to retaliate against China's currency misalignment, steel trade

+See More

President Trump poses new threats to Fed Chair monetary policy independence again.

Apple Boston

2025-06-20 08:27:00 Friday ET

President Trump poses new threats to Fed Chair monetary policy independence again.

President Trump poses new threats to Fed Chair monetary policy independence again. We describe, discuss, and delve into the mainstream reasons, conc

+See More

President Trump meets the CEOs of tech titans such as Apple, Microsoft, Google, and Amazon.

John Fourier

2017-06-15 07:32:00 Thursday ET

President Trump meets the CEOs of tech titans such as Apple, Microsoft, Google, and Amazon.

President Donald Trump has discussed with the CEOs of large multinational corporations such as Apple, Microsoft, Google, and Amazon. This discussion include

+See More

Michael Sandel analyzes what money cannot buy in stark contrast to the free market ideology of capitalism.

Daisy Harvey

2023-06-21 12:32:00 Wednesday ET

Michael Sandel analyzes what money cannot buy in stark contrast to the free market ideology of capitalism.

Michael Sandel analyzes what money cannot buy in stark contrast to the free market ideology of capitalism. Michael Sandel (2013)   What money

+See More

President Trump signs an executive order to freeze federal employee pay in early-2019.

Rose Prince

2019-01-06 08:39:00 Sunday ET

President Trump signs an executive order to freeze federal employee pay in early-2019.

President Trump signs an executive order to freeze federal employee pay in early-2019. Federal employees face furlough or work without pay due to the govern

+See More

The new world order of trade helps accomplish non-economic policy goals such as national security and technological dominance.

Amy Hamilton

2024-01-31 14:33:00 Wednesday ET

The new world order of trade helps accomplish non-economic policy goals such as national security and technological dominance.

The new world order of trade helps accomplish non-economic policy goals such as national security and technological dominance. To the extent that freer

+See More