The Dow Jones Industrials (DJINDICES:^DJI) ended its run of record highs today, dropping 22 points. Playing a big role in that relatively minor decline was JPMorgan Chase (NYSE:JPM), which fell 1.5%. Yet, the latest news came after the market closed for the day, as the California Attorney General sued the banking giant over allegations of illegal debt-collection tactics from more than 100,000 credit card holders.

As Fool contributor John Grgurich noted earlier, today's decline in the bank's stock could stem from the fact that JPMorgan faces a critical shareholder meeting in less than two weeks, after which the role of CEO and Board Chairman Jamie Dimon could dramatically change. JPMorgan's share-price drop wasn't out of line with the performance of other banks, as fellow Dow component Bank of America (NYSE:BAC) fell 0.8%, while Citigroup (NYSE:C) and Wells Fargo (NYSE:WFC) lost about the same percentage as JPMorgan. Moreover, news of the lawsuit didn't move JPMorgan shares substantially in early after-hours trading.

But the suit is troubling for a couple reasons. First and foremost, the card-collection lawsuit makes allegations that look eerily similar to the mortgage robosigning debate that led to a massive settlement among various mortgage lenders. With hundreds of lawsuits being filed in a single day in some instances, the California AG argues that bank officials never reviewed files, bank records, or other documents before signing legal papers. It also alleges false misrepresentations that customers had been notified of the suits when customers were, in fact, unaware of them.

More importantly, though, the California AG's lawsuit represents just the latest in a seemingly never-ending timeline of litigation for major banks. Bank of America made huge progress earlier this week by settling a lawsuit with MBIA; yet, the very same day, the New York Attorney General filed suit against it and Wells Fargo alleging violations of the $25 billion settlement the banks made with federal and state regulators just over a year ago. Although major banks have won initial victories in lawsuits related to the LIBOR rate-fixing scandal, potential liability may nevertheless still exist there.

When will it end?
Clearly, the law should hold big banks accountable for their misdeeds, and where reasonable allegations exist, lawsuits aren't frivolous. But for bank investors, legal action after legal action makes it impossible for the industry to find closure after the financial crisis. Now that they've gotten their financial risks under control, banks need to do a better job with legal risk management if they want to avoid seeing their names in the headlines -- and on court papers.

Fool contributor Dan Caplinger owns warrants on Wells Fargo, Bank of America, and JPMorgan Chase. You can follow him on Twitter @DanCaplinger. The Motley Fool recommends Wells Fargo. The Motley Fool owns shares of Bank of America, Citigroup, JPMorgan Chase, and Wells Fargo. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.