In the spirit of sharing, I note mine below. Note that my account has been getting a fortnightly cash infusion of approximately 0.75% of NAV. I track the performance of my account versus SPY (using VFINX as proxy) using both total return and XIRR.
Total return = [NAV - (NAV on 12/31/2014 + cash additions since 12/31/2014)]/[NAV on 12/31/2014 + cash additions since 12/31/2014], where NAV is current net asset value
XIRR is calculated using current NAV and the cash flows, beginning with NAV on 31/12/2014 and the subsequent cash additions.
I calculate returns on both USD and AUD (my home currency).
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Total returns (USD): 5.2%
Total returns (AUD): 10.1%
Total returns (SPY, USD): 0.2%
XIRR (USD): 29.9%
XIRR (AUD): 64.7%
XIRR (SPY, USD): 1.2%
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It was much better just a week or so back, but 'm still handily beating SPY, so shouldn’t really be complaining.
Anirban