How much US stocks should your portfolio hold?

Each time the S&P 500 provides a return higher than local Indices, Indian investors want to know if they can hold US Stocks. Does this make sense? If so, how much exposure should they have?

Published on / By M. Pattabiraman Twitter: @pattufreefincal / 5 Comments

Published: November 8, 2019 at 12:40 pm

Last Updated on December 29, 2021

“Should I hold international stocks in my portfolio?” is a question that investors ask when returns in the local stock markets pale. In an Indian context, this typically means “buying US stocks”. So the questions to ask are, “should I buy US stocks?”, “if yes, how much should I hold?”

After the 2008 crisis, the US markets have had moved up significantly with only two -negative annual returns: -0.7% in 2015 and -6% in 2018. Almost all other annual returns were in two digits and three 20% plus years.  Dividends are not included in this! Source: macrotrends

Although the Indian markets too moved up during this period and often much more, the Sensex fell by 23% in2011; In 2015 and 2016, Sensex did not beat a savings bank account and an FD in 2018. Naturally, this would make any investor look for greener pastures. Let us find out.

We start the analysis with a comparison of Nifty 50, Nifty Next 50 and S and P 500 (all dividends included) from Nov 2002. Unfortunately, this data set is rather small. There are several disadvantages associated with this, as discussed below. This is what we have, and we will have to work with it.

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    Nifty 50 vs Nifty Next 50 vs S and P 500

    The graph is in log scale, and a small portion of the S and P 500 (during the 2008 crisis) is cut off to make the rest of the plot clear.

    Comparison of S and P 500 with Nifty Next 50 and NIfty from Nov 2002Just by looking at this, one might be tempted to conclude that “over the long term” it makes sense for an Indian investor to stick with the Indian market. This is reasonable with the caveat that the Indian market may not grow as much and as fast as it did in the past.

    Not so fast! We need to dig deeper. Please be sure to see all the graphs and read the article in full. Also, there is something missing in the above chart. The S and P 500 is in USD while the Nifty indices are in INR. So when the S and P 500 is converted to INR, we get this.

    Nifty 50 vs Nifty Next 50 vs S and P 500 (in INR)

    Comparison of S and P 500 in INR with Nifty Next 50 and NIfty from Nov 2002Many readers may be disappointed to note that the difference is not much between the S&P 500 and S&P500-INR. This is because the USD to INR conversion rate does not provide a significant gain over time (although it feels like it). This is the five-year rolling returns.

    USD to INR conversion rate rolling returns over five yearsWe had discussed this earlier when reviewing Motilal Oswal Nasdaq 100 Fund of Fund: Why you should not invest!

    Now we can construct different composite portfolios. We had earlier seen that 80% of Nifty 50 (n50) and 20% of NIfty Next 50 (nn50) could replicate the Nifty 100 well. See: Combine Nifty & Nifty Next 50 funds to create large, mid cap index portfolios.

    We shall ignore taxes and exit loads. The portfolios are assumed to be rebalanced each month. Look for the movement of the white line. This is the composite portfolio. The evolution of the composite portfolios is shown below. This is monthly data so some features may be missing.

    Composite 1: n50 (80%) + nn50(20%) + SP500-INR (0%)

    Composite portfolio with S and P 500 zero per cent Nifty 50 80 per cent and Nifty Next 50 20 per centComposite 2: n50 (70%) + nn50(20%) + SP500-INR (10%)

    Composite portfolio with S and P 500 10 per cent Nifty 50 70 per cent and Nifty Next 50 20 per cent

    Composite 3: n50 (60%) + nn50(20%) + SP500-INR (20%)

    Composite portfolio with S and P 500 20 per cent Nifty 50 60 per cent and Nifty Next 50 20 per cent

    Composite 4: n50 (50%) + nn50(25%) + SP500-INR (25%)

    Composite portfolio with S and P 500 25 per cent Nifty 50 50 per cent and Nifty Next 50 25 per cent

    Composite 5: n50 (40%) + nn50(30%) + SP500-INR (30%)

    Composite portfolio with S and P 500 30 per cent Nifty 50 40 per cent and Nifty Next 50 30 per cent

    Composite 6: n50 (25%) + nn50(25%) + SP500-INR (50%)

    Composite portfolio with S and P 500 50 per cent Nifty 50 25 per cent and Nifty Next 50 25 per centRolling Returns of the composite portfolios

    We have a short window to work with here. Focus your attention on the dotted green line. That has no S&P 500 contribution. It perhaps ironic and even amusing that after the start of the late-2013 upward movement in the Indian stock market, composite portfolios have done better!

    Rollig Returns of the composite portfoliosThe red line with 50% of S&P 500 and 25% n50 and 25% nn50 has the lowest return spread. Based on this limited dataset, this balances return and risk well (based on a simple visual observation).

    Yes, the above data suggests that “some exposure to S and P 500” will be beneficial to the investor. At the very least, it cannot hurt and will lower risk. However, there are two significant problems.

    It is not easy to say “how much” is enough. Exposure to 50% of S and P 500 is simply too risky if there is a repeat of 2008. Say how about 20%? Yes, but this involves effort. Regular rebalancing ignoring taxes and exit loads.  Anything lower will not help.

    The second problem is, most investors who want returns, want only returns. They are either ignorant of risk management or unwilling to put in the effort and pay the taxes. The higher returns or lower risk that seems so natural in Excel is quite in reality.

    What the investment options?

    1. Funds like Parag Parikh Long Term Equity Fund handle this quite well.  There is not tax or exit load outgo and rebalancing to worry about. Also, the international portfolio is not restricted to US stocks. This IMO is the best-suited option for most investors. However, exposure to the fund must be significant to make a difference. Disclosure: the author is invested. See for details: My personal financial audit 2018
    2. Using international feeder funds will also work, the expense ratio (not considered above) can dampen returns.  Investors with an eye on the Nasdaq 100 via Motilal Oswal Nasdaq 100 Fund of Fund will have to keep concentration risk in mind. See this comparison with S & P 500, for example.
    3. If your investment ticket size is large, you can consider directly buying S P 500 ETFs or US stocks. See this article by SEBI RIA Avinash Luthria:  Open a low-cost international broking account and invest in low-cost foreign exchange-traded funds
    4. Exposure to the US market can be fruitful when it moves up but can hurt badly during downturns. Therefore investors must study past risk (not the returns, especially recent) before committing money. To profit from international diversification discipline and active management is essential.
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