Jack Henry & Associates (JKHY) had the highest return between February 10, 1991 and December 15, 1995 by a US stock with a market cap of $10B+, returning 1,974.9%.

Dollar Tree (DLTR) had the highest return on September 5 by a large-cap US stock, returning 8.5%.

Biogen (BIIB) had the highest return between January 1, 1995 and January 31, 1996 by a US stock in the S&P 500 (GSPC), returning 882.9%.

The lowest closing price for Berkshire Hathaway (BRK.A) all-time was $245, on April 15, 1980. The latest price is $705,999.

The closing price for Anixa Biosciences (ANIX) in May 2011 was $10, on May 31, 2011. It was up 77.8% for the month. The latest price is $3.08.

The closing price for Anixa Biosciences (ANIX) in April 2011 was $5.69, on April 29, 2011. It was up 26.4% for the month. The latest price is $3.08.

Anixa Biosciences (ANIX) had the highest return between May 1, 2011 and May 31, 2011 by a US stock with a market cap of $100M+, returning 77.8%.

Sorry, available market cap data for Best Buy (BBY) starts on January 2, 2009. Best Buy (BBY) has a market capitalization of $19.9B, based on 214.72M shares at a price of $92.66 (up 1% on Friday).

The closing price for Amarin (AMRN) in April 2011 was $16, on April 29, 2011. It was up 117.4% for the month. The latest price is $0.50.

The closing price for Ammo (POWW) in April 2011 was $2.25, on April 27, 2011. It was up 150% for the month. The latest price is $1.21.

Cisco Systems (CSCO) had the highest return between February 10, 1991 and December 15, 1999 by a US stock with a market cap of $10B+, returning 23,866%.

The closing price for Paysign (PAYS) in April 2011 was $0.22, on April 29, 2011. It was up 120% for the month. The latest price is $3.38.

Oracle (ORCL) had the highest return between February 10, 1991 and December 15, 1999 by a mega-cap US stock, returning 9,167.2%.

Ammo (POWW) had the highest return between April 1, 2011 and April 30, 2011 by a US stock with a market cap of $100M+, returning 150%.

Nextplat (NXPL) had the highest return between April 1, 2011 and April 30, 2011 by a US stock, returning 238.5%.