Walmart (WMT) returned 60.3% in 1983.

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

Nike (NKE) returned 44.9% in 1990.

Nike (NKE) returned 184.4% in 1989.

Nike (NKE) returned 40.1% in 1988.

Nike (NKE) returned 321.1% in 1987.

Sorry, available market cap data for Nike (NKE) starts on January 2, 2009. Nike (NKE) has a market capitalization of $119.3B, based on 1.51B shares at a price of $78.94 (down 0.4% today).

Snap (SNAP) had the highest return in October 2020 by a large-cap US stock, returning 49.9%.

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

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

Walmart (WMT) returned 20.8% in 1988.

GameStop (GME) returned 125.4% in 2007.

Microsoft (MSFT) returned -2.7% in 1988.

Microsoft (MSFT) returned 125.1% in 1987.

Quidel (QDEL) had the highest return between January 1, 2020 and April 30, 2020 by a mid-cap US stock or mid-cap US stock, returning 84.7%.