The U.S. Department of Labor’s fiduciary rule, set to go into effect this coming April, may have acquired a post-election wrinkle. We don’t yet know if the incoming Trump administration will alter or delay the rule, but no matter how the details shape up, the rule’s substance will still stand: Clients and home offices will compel more financial advisors to embrace a fiduciary standard and migrate their practices from commissions to fee-based compensation for advice.

The rule only accelerates a sea change that has been building for some time. The growth of wrap accounts, for which clients pay an annual fee instead of a commission for each transaction, took off in the U.S. in the early 2000s. The concept then went global, jumping to Europe (notably Great Britain and the Netherlands) and Australia. In each case, regulatory reform has resulted in sharply fewer brokers and lower fees for investors.

If the global experience is any guide, we’re likely to see trillions of dollars in motion in the coming years, as commission-based models give way to fee-based services. BlackRock expects that by 2020, 80% of our client assets will be in fee-based accounts, double what they are today. Rep-as-PM and rep-as-advisor assets are growing fastest and will likely double from $2 trillion today to $4 trillion by 2020.

The ruling is also accelerating other industry trends that were building for some time. Asset managers and brokerage firms are retooling their business models and investing in digital advice technology. Importantly, they are tapping into what has become more than an industry—it has become an ETF movement—to reduce the complexity and cost of building great portfolios. U.S.-listed ETFs had already smashed 2015 new flows with $273 billion year to date (as of December 15).

So what should financial advisors do to prepare in this new era? Here is what we have learned from listening to the best advisors and analyzing how they invest:

First, advisors need to move from selecting products to building portfolios that meet client goals. That means paying attention not only to which funds they choose but also how they work together.

Second, they should know the hidden risks that lurk in even the most balanced portfolio. Using our Aladdin technology, we stress-tested thousands of investment portfolios and found, for example, that the bond allocation carried outsized credit risk, and was amplifying, rather than diversifying, stock risk.

Finally, advisors need to deliver the value and premium service that investors are increasingly demanding. As a result, successful advisors are more focused than ever in creating real value from their investment management. Going beyond the traditional debates around active and passive, they are sharpening their focus on the quality, appropriateness of the benchmark and cost-efficiency of funds.

They are replacing costly index-hugging active managers with lower-cost ETFs for the core of client portfolios, capturing U.S. stock exposures for a mere three or five basis points, and using radically more efficient benchmarks for the broad bond market, like the Barclays U.S. Universal instead of the Barclays Aggregate. In other words, they’re “actively using passive” to build better portfolios for clients, alongside high-conviction, high-value active funds.

For the wealth management industry, the adoption by more financial advisors of fiduciary standards is now an unstoppable force—a revolution that should increase trust in the industry and give savers more confidence to become investors.

Martin Small is head of U.S. iShares at BlackRock.