Which ASX 300 shares are the biggest winners and losers mid-week?

The S&P/ASX 300 Index (ASX: XKO) is edging higher today after spending the last two days in negative territory.

At the time of writing, the ASX 300 is up 0.08% to 7,510 points. This is just 1.5% shy of its record high of 7,625 points achieved last…