THE IDEA of a mid-season trading period is expected to be raised with players during the AFL Players' Association's regular mid-year tour of clubs that began this week in Adelaide.

Although the AFLPA will have a broad agenda, with collective bargaining negotiations expected to hot up before the end of the season as the players seek a percentage of the League's revenue, the subject of player movement is certain to be addressed.

Players are keen to change the eligibility criteria for free agency to make it easier for players to move clubs, but the AFLPA's policy on other ideas such as the mid-season trade period will not be clear until players are consulted.

After the issue was put on the agenda last week, AFL CEO Gillon McLachlan said he was keen for clubs to consider the possibility of a mid-season trade period being introduced as early as 2017.

Geelong coach Chris Scott said the Cats were open to discussing all ideas but he thought the art of list management was a valuable part of the game that needed to be protected. 

His former player, Steve Johnson, now with Greater Western Sydney, described the idea on Twitter as ridiculous. 

However prominent player agent Tom Petroro from Stride Sports Management told AFL.com.au on Monday that a month-long trade period could work in the middle of the year.  

"I think if we opened it up for a month, I don't think it'd be as intense a period as trade period is now," Petroro said.

"I think it'd be something that clubs would plan towards from round four or five onwards.

AFL.com.au understands a mid-season trading period was just one of a range of issues discussed at a brainstorming meeting between AFL officials and club list managers on how to quicken the pace of rebuilds and improve competitive balance.

It is understood that list sizes, the possibility of trading players on draft night, the impact of trading future picks, free agency and the points bidding system were also discussed at that session held about a fortnight ago.