misc.invest.technical - join
Analyzing market trends with technical methods.
Low activity, 1176 subscribers, Usenet

misc.invest.futures - join
Physical commodity and financial futures markets.
Medium activity, 1231 subscribers, Usenet

misc.invest.stocks - join
Forum for sharing info about stocks and options.
High activity, 4772 subscribers, Usenet

misc.invest.mutual-funds - join
Mutual Funds.
Medium activity, 1490 subscribers, Usenet

Chicago Options Traders - join
This group is an extension of the Chicago Option Traders blog. While the blog will contain more commentary and general info, this group will be set up to discuss particular options trades that members of the group wish to discuss. This group also meets once a month in Chicago.
Low activity, 313 members, moderated

misc.invest.financial-plan - join
Financial planning in general. (Moderated)
Medium activity, 1696 subscribers, Usenet

aus.invest - join
Investment and other financial matters.
High activity, 625 subscribers, Usenet

misc.invest.misc - join
Investments not in other misc.invest.* groups.
Low activity, 426 subscribers, Usenet

misc.invest.canada - join
Investing in Canadian financial markets.
Medium activity, 758 subscribers, Usenet

alt.invest.penny-stocks - join
Investing in low cost stocks.
Low activity, 268 subscribers, Usenet