A quick pair of SIPP top-ups today — nothing flashy, nothing speculative, just feeding the diversified core that does the heavy lifting inside my pension. I added to two existing positions: the Vanguard Diversified Portfolio Growth ETF (VDPG) and the Vanguard Global Aggregate Bond UCITS ETF (VAGS). Both are broad, both are boring, both are exactly the kind of holdings I want forming the foundation of a pension I won't access for years.
A quick reminder on how I think about my SIPP. The vast majority of the money sits in broad, diversified ETFs. That's the engine — doing the quiet, unglamorous work of compounding year after year. The individual shares and thematic picks are the satellites — small, high-conviction positions I keep deliberately tiny. Collectively, those satellites make up less than 10% of the SIPP. The rest is broad funds like the two I topped up today. When I add to them, I'm reinforcing the core. That's exactly what today was about.
First up: more VDPG — the Vanguard Diversified Portfolio Growth UCITS ETF. If you haven't come across this one before, it's a fund-of-funds that bundles multiple Vanguard ETFs into a single holding. Inside VDPG you get exposure to global equities, global bonds, and a small allocation to UK bonds — all in one ticker. The equity side covers developed and emerging markets across large, mid, and small-cap companies. The bond side covers government and corporate bonds across the globe, hedged back to sterling. It's designed as a ready-made diversified portfolio in a single ETF, and the ongoing charge reflects the underlying fund costs — around 0.24% all-in, which is very reasonable for what you're getting.
Why do I like VDPG for my SIPP? Because it removes the temptation to tinker. When I hold a single all-in-one fund, I can't second-guess the equity-bond split. I can't decide I'm 'clever' and overweight one region or underweight another. VDPG rebalances itself. The asset allocation is decided by Vanguard's team, not by me on a Tuesday afternoon after reading too many market headlines. For a pension that has decades to run, that kind of enforced discipline is genuinely valuable. I'm my own worst enemy when it comes to overthinking, and VDPG takes that option off the table.
The growth version — as opposed to the more conservative options in Vanguard's LifeStrategy range or the moderate VDPG variants — maintains a high equity allocation, typically around 80% equities to 20% bonds. That's aggressive by conventional standards for someone my age, but the time horizon on my SIPP is long and I'm comfortable with the volatility that comes with a high equity weighting. The bond allocation is there as a stabiliser, not as the main driver of returns. When equities have a rough patch, the bonds provide a bit of ballast. When equities are running, the bonds drag a little. Over the long term, the equity engine does the work and the bonds smooth the ride.
Second: more VAGS — the Vanguard Global Aggregate Bond UCITS ETF. This is the pure bond exposure inside my SIPP, and it's about as broad as bond funds get. VAGS tracks the Bloomberg Global Aggregate Bond Index, hedged to sterling. That means it owns government bonds, corporate bonds, and securitised bonds from across the developed and emerging world — US Treasuries, UK Gilts, German Bunds, Japanese government bonds, investment-grade corporate debt, the lot. Thousands of individual bonds in a single holding, hedged back to pounds so I'm not taking currency risk on the fixed-income side.
Why hold bonds at all when equities outperform over the long term? That's a fair question and one I've wrestled with. The honest answer: bonds aren't in my SIPP for their returns. They're there for their behaviour. When equity markets have one of their periodic meltdowns — and they will, they always do — high-quality bonds tend to hold their value or even appreciate as investors flee to safety. Having a chunk of bonds means I've got dry powder. It means the drawdown on my overall portfolio is shallower when things get ugly. And it means I'm less likely to do something stupid — like selling at the bottom — because the total portfolio value hasn't fallen as far.
VAGS is particularly useful for this role because of its breadth. It's not just UK government bonds (which would leave me concentrated in one country's interest rate cycle). It's not just corporate bonds (which tend to correlate more with equities during stress). It's everything — government, corporate, developed, emerging, short-duration, long-duration — all blended into a single fund with an ongoing charge of 0.15%. That's cheap for genuinely global bond exposure. The sterling hedging is crucial too — unhedged global bonds introduce currency volatility that can easily swamp the modest returns bonds are supposed to deliver. Hedged, I get the diversification benefit without the currency noise.
Between VDPG and VAGS, these two ETFs represent the diversified, boring core of my SIPP. VDPG does the growth — global equities with a bond overlay for stability. VAGS does the pure fixed-income ballast — thousands of bonds across the globe, hedged to sterling, providing genuine diversification from equities. Together they form the foundation that the more adventurous satellite positions — the MEAT, the SMH, the CRWV, the individual shares — orbit around.
Today's top-ups were modest. Nothing clever. No market timing. Just noticing that both positions had drifted slightly below my target allocations after the recent run of individual share buying, and directing fresh capital to bring them back in line. This is portfolio maintenance, not strategy. It's the unsexy work of making sure the core stays the core, and the satellites don't accidentally become the main event.
Is any of this a recommendation? Absolutely not. VDPG and VAGS happen to suit my circumstances — a SIPP with a long time horizon, a desire for broad diversification without constant tinkering, and a preference for Vanguard's low-cost, index-tracking approach. Your circumstances, goals, platform, and risk tolerance are different from mine. The asset allocation that works for a 66-year-old with a particular pension pot and a particular risk appetite almost certainly isn't right for you. Do your own research.
As always: this is what I did with my own money. It's not a recommendation. Do your own research. All investing carries risk — you can lose money, and past performance doesn't predict future returns. The value of bond investments can fall as well as rise, particularly when interest rates change. Multi-asset funds like VDPG involve risks associated with both equity and bond markets. Your circumstances, goals, and risk tolerance are different from mine.