Mutual funds have helped introduce the masses to stocks and have played a big role in portfolios for individual investors. However, they appear to be well past prime time.\r\n\r\nIn 2015 the S&P 500 Index posted a meager total return of 1.4 percent, including dividends. And yet 66 percent of actively managed large-company stock funds were unable to exceed even that low bar, according to the SPIVA U.S. Scorecard.\r\n\r\nYet seemingly every year, articles in the financial media assure us that this will be the year of the stock picker. Asset managers selling droves of mutual funds furiously research the reasons for yet another year of underperformance, and they are quick to identify mounting "evidence" that the environment is about to change to benefit professional stock pickers.\r\n\r\nBut rather than looking for elaborate excuses, maybe it's time to draw a different conclusion. Perhaps actively managed mutual funds are no longer the best way to gain exposure to equities and fixed-income asset classes. Quite simply, it's no longer prime time for the mutual fund industry.\r\nThe modern mutual fund concept as we know it \u2014 pooling capital from investors to buy securities \u2014 dates back almost 100 years. Over the decades, investors have periodically embraced and eschewed these investment vehicles, but it wasn't until the late 1970s that widespread interest in the stock market began propelled select fund managers to rock-star status. Maybe that was the beginning of the end.\r\n\r\nAccording to the Mutual Fund Education Alliance, the benefits of investing in mutual funds include the ability to harness professional money managers' expertise, diversification, affordability and low (typically) minimum investment thresholds, and accessibility and liquidity.\r\n\r\nThat all sounds good, and there's no doubt the mutual fund industry should be applauded for educating investors and providing a gateway to participate in the public ownership of growing companies.\r\n\r\nBut the financial services industry is dynamic, and at some point investors need to step back and ask themselves: "Are today's actively managed mutual fund offerings still attractive, and should investors continue to allocate to these vehicles?"\r\nRepeated poor performance, unfair treatment of tax liabilities, high costs and other inherent flaws make most mutual funds a poor value proposition.\r\nPerhaps with the exception of select strategies or niche sub-asset classes, I believe that today's actively managed open-end mutual funds offer a poor value proposition. Let me count the ways:\r\n1. Performance\r\nNobody likes to be average, and the mutual fund industry has done its best to exploit the notion that investors should not settle for the average performance of broad market indices. Unfortunately, actively managed mutual funds have, for the most part, delivered worse than average performance. Year after year a shocking number of actively managed funds underperform their respective benchmarks. The data is quite damning.\r\n\r\nFor example, Morningstar's Active\/Passive Barometer, a semiannual report that measures the performance of U.S. active managers against their passive peers, "finds that actively managed funds have generally underperformed their passive counterparts, especially over longer time horizons, and experienced higher mortality rates (i.e. many are merged or closed)."\r\n2. Tax inefficiency\r\nMutual funds are highly tax-inefficient vehicles, even patently unfair to some investors. In any investment vehicle that pools assets, expenses and tax liabilities are shared across all shareholders of record, regardless of the date of purchase or length of ownership.\r\n\r\nConsider what that means for today's investors. Seven years into a bull market, most mutual funds will have their share of winners that they have owned for years. If a fund manager wants to lock in profits or otherwise exit a position, there will be tax consequences.\r\n\r\nBut any investor who allocates new capital to this fund in the same calendar year that the fund sells that position, that investor may be forced to share in the tax liability even though he or she did not benefit from the rise in that company's share price. Who wants to be allocated a full ration of capital gains without receiving the profits? That doesn't sound like efficiency to me.\r\n3. Transparency (or lack thereof)\r\nDo you really know what's inside your mutual fund? I challenge you to look up the top 10 holdings from your funds that advertise different investment philosophies and styles. It's highly likely that your "Value" manager and your "Growth" manager, for example, may be buying many of the same stocks, but for different reasons. How much cross-ownership of individual companies are in your portfolio? Suddenly that diversification benefit touted by the mutual fund industry may not be so clean.\r\n\r\nAnd what about "scope creep," or "style drift," as it's known in the business? There's no question that investors tend to chase performance, for better or worse. The hot funds raise gobs of capital after a short period of outperformance. But suddenly that same fund needs to loosen its investment parameters or alter its philosophy just to put its windfall of capital to work. Successful funds often become a victim of their own success, and that's why performance tends to revert to the mean.\r\n\r\nPreviously published on CNBC.com.\r\n\r\nPersonal Capital Advisors Corporation is a registered investment advisor with the Securities Exchange Commission ("SEC"), which does not imply a certain level of skill or training. This communication and all data are for informational purposes only and do not constitute a recommendation to buy or sell securities. Third party data is obtained from sources believed to be reliable. However, PCAC cannot guarantee that data's currency, accuracy, timeliness, completeness or fitness for any particular purpose. Certain sections of this commentary may contain forward-looking statements that are based on our reasonable expectations, estimate, projections and assumptions. Forward-looking statements are not guarantees of future performance and involve certain risks and uncertainties, which are difficult to predict. Keep in mind investing involves risk.