Barron's [subscription required] summarizes the likely fate of different classes of Auction Rate Securities (ARS) holders -- the $330 billion market for securities that used to reset in weekly auctions before it froze up in February. It reports that If you hold ARSs sold by a municipality or a taxable, closed-end mutual fund you may already have gotten your money back or may do so within weeks. And those holding issues from tax-free, closed-end municipal-bond funds will likely see some money back before long. But others may have a long wait ahead.

I first wrote about this in February and since then, the post has accumulated 4,031 comments. I cannot imagine how difficult it must be for these people to think they had their money in a safe, money-market like fund -- only to discover that they could not get access to their money at all. It appears that many of these ARS holders did not receive a prospectus and were not warned that the auctions could fail.

Meanwhile, here's Barron's prognosis for the different classes of ARS holders:

• Municipal Issuers. Issuers like cities and toll roads had about $165 billion of the ARS market. Bloomberg estimates that north of $63 billion of municipal ARS have been refinanced, and that ARS holders were bought out without losing any money. About half of the municipal auctions are working again, with interest rates in the 4% to 5% area.

Back in 1898, John Nuveen started the firm Nuveen Investments (NYSE: JNC) to trade municipal bonds. It was a smart move. Now, the firm is a big player in the asset management space, with about $165 billion in assets under management.

Well, soon Nuveen will no longer be a public company. It announced today that private equity firm Madison Dearborn Partners LLC has agreed to a $5.42 billion buyout.

Interestingly enough, Nuveen wants to do the transaction so as to have more flexibility in pursuing its long-term growth goals. After all, it can be distracting to deal with the mind-numbing regulations of Sarbanes-Oxley and also the quarter-by-quarter pressures of Wall Street analysts.

No doubt, Nuveen's business is growing nicely. In fiscal Q1, net income increased 17% to $52.3 million.

On the news of the deal, shares of Nuveen spiked 17.15% to $63.45. The current buyout bid is $65.

Tom Taulli is the author of various books, including the Complete M&A Handbook and the EDGAR-Online Guide to Decoding Financial Statements.