Caesars Entertainment (CZR) had the highest return between January 16, 2015 and February 16, 2016 by a US stock in the S&P 500 (GSPC), returning 126.5%.

Toll Brothers (TOL) had its best quarter since 2018 in Q2 2020, returning 80.1%.

Lululemon Athletica (LULU) had the highest return between December 16, 2015 and January 16, 2016 by a US stock in the S&P 500 (GSPC), returning 12%.

Advanced Micro Devices (AMD) had the highest return between December 16, 2015 and January 16, 2024 and in 2016 by a US stock in the S&P 500 (GSPC), returning 309.4%.

Regencell Bioscience (RGC) has had the highest return between March 1, 2024 and December 9, 2025 by a mid-cap US stock, returning 8,776.1%.

On December 31, 2014, Facebook (META) had a market capitalization of $218.4B, based on 2.82B shares at a price of $77.54.

DevvStream Corp Common Stock (DEVS) has had the highest return between March 1, 2024 and December 9, 2025 by a US stock, returning 152,627.3%.

Ast Spacemobile (ASTS) has had the highest return between March 1, 2024 and December 9, 2025 by a large-cap US stock, returning 2,212.5%.

The closing price for Bitcoin (BTC) in terms of GBP in 2014 was 199.50, on December 30, 2014. It was down 56.2% for the year. The latest price is 67,627.00.

The closing price for Bitcoin (BTC) in terms of GBP in 2013 was 456.46, on December 30, 2013. It was up 5,374.2% for the year. The latest price is 68,906.61.

The closing price for Apple (AAPL) on Friday was $278.28. It was up 0.2% for the day (up 0.1% from previous close).

Grupo Financiero Galicia SA ADR (GGAL) has had the highest return between October 28, 2019 and October 28, 2024 by a US stock in the Banking Industry, returning 441.9%.

Diversified Energy (DEC) had the highest return between 2019 and 2023 by a US stock, returning 13,424,200%.

The closing price for Apple (AAPL) in 2001 was $0.33, on December 31, 2001. It was up 47.3% for the year. The latest price is $277.24.

Sorry, I don't have the answer to that one.