Today’s piece in the WSJ Investing in Funds and ETFs Report covers the Columbia Acorn Fund (ACRNX, Class Z shares). This $12.5 billion fund sports a relatively low 0.79% expense ratio and a 17% turnover. According to the article, the fund is facing a replacement of its lead manager

Columbia Acorn has gained 15% a year on average in the three years through May 29, compared with 17.4% for its average midcap-growth peer… Still, the fund’s longer-term track record remains intact; it has gained 10.7% a year on average in the 15 years through May 29, while its average peer has gained just 4.8% in the period… Assets in Columbia Acorn [] have fallen to $12.2 billion from about $20 billion in June of last year.

The primary benchmark for the fund is the Russell 2500™ Index, which is a small-cap subset of the broader Russell 3000® Index. Unfortunately, there are currently no ETFs implementing the 2500 index. The secondary benchmark for the fund is the Russell 2000® Index. One of the practical, long-lasting implementations of this index is the iShares Russell 2000 ETF (EWM). Alpholio™’s calculations show that since 2000, the fund returned more than the ETF in about 76% of all rolling 36-month periods, with a median outperformance of 8.8%. However, these figures apply to a long time span when the fund had other managers.

Let’s take a closer look at the Columbia Acorn Fund’s performance by applying Alpholio™’s patented methodology. To track the fund over time, Alpholio™ constructs a dynamic reference portfolio of ETFs. In the most popular variant of the methodology, the membership of the reference portfolio is fixed but the ETF weights can fluctuate. Here is a chart of the resulting cumulative RealAlpha™ for the fund:

Cumulative RealAlpha™ for Columbia Acorn Fund (ACRNX)

From early 2005 through 2012, the fund generated a small amount of positive RealAlpha™. However, since then the fund subtracted value vs. its reference portfolio: the annualized discounted cumulative RealAlpha™ was in the negative 0.3-0.5% range (to learn more about RealAlpha™, please visit our FAQ). At around 17.8%, the fund’s standard deviation (a measure of volatility of returns) was comparable to that of its reference portfolio. The fund’s RealBeta™ was about 1.12.

The following chart illustrates a buy-sell signal derived from the smoothed cumulative RealAlpha™:

Buy-Sell Signal for Columbia Acorn Fund (ACRNX)

This signal alerted investors to potential relative underperformance problems of the fund as early as mid-2010.

The final chart shows the composition of the reference ETF portfolio over the same analysis period:

Reference Weights for Columbia Acorn Fund (ACRNX)

The fund had equivalent positions in the iShares Morningstar Mid-Cap Growth ETF (JKH; average weight of 17.4%), iShares S&P Mid-Cap 400 Growth ETF (IJK; 13.8%), iShares Russell 2000 Growth ETF (IWO; 13.1%), iShares Core S&P Mid-Cap ETF (IJH; 10.2%), Vanguard Consumer Discretionary ETF (VCR; 9.1%), and Vanguard Industrials ETF (VIS; 8.8%). The Other component in the chart collectively represents additional six ETFs with smaller average weights.

Despite a low turnover rate, the fund has historically produced significant long-term capital gain distributions, e.g. over 15% of the NAV in 2014 and 6% in 2013. This indicates that that fund may not be the best fit for taxable accounts.

Returns of the Columbia Acorn fund in 2013 and 2014 were well below expectations. Coupled with significant management changes, this has invalidated the past long-term performance of the fund as a source of any meaningful guidance for its future. Fortunately, Alpholio™’s buy-sell signal alerted investors early on to the deterioration of risk-adjusted returns.

To learn more about the Columbia Acorn and other mutual funds, please register on our website.


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