The only lump sum I normally have to deal with is the annual bonus of which there was none in 2008 and 2009, and I'm now retired. I've never counted on a bonus and always put it into the retirement funds into the target AA.
This is our first year of retirement and we are about to receive our 3rd unexpected 5 figure lump sum.
1. My megacorp decided to reward it's employees for 2 years of frozen wages and lack of bonuses with it's biggest bonus pay-out ever, including retirees that had worked for the whole of 2009.
2. We completed the sale of my Dad's house after he died in December and split the estate between the 4 children.
3. FIL died in June and his house has now been sold and his estate settled and split between the 4 children.
The bonus went into the savings into the target AA but the 2 inheritances are in the UK so we haven't fully decided what to do with the monies yet. We spent some of it over the summer with our 10 weeks in England and since we plan to spend about 6 months in England / Europe next year we'll leave a big chunk of it in place for those expenses.
Interest rates are very low in the UK at present, particularly for non-residents (all the higher rates including Bank of Baroda have UK residency as a requirement). I looked at the possibility of putting some into UK mutual funds but their rates are MUCH higher than the USA plus there are hidden fees as well as the stated fees.
£7billion a year skimmed off our savings - Telegraph
If exchange rates improve greatly in our favor then I'll see about transfering a chunk of the loot over before next year otherwise I'll leave it where it is in our UK bank earning about 0.9%.