As an ex-investment banker I’ve seen all sorts of techniques for packaging up data and charts to spruik a product. Performance chart isn’t compelling enough? Crop it and make the bad bits disappear. Want to prove the long-term performance of your strategy? Pick the period in which it performed best. Selling a risky debt product? Get a ratings agency to stamp it with As or Bs (there’s a reason they use AAA, AA, A, BBB and not A, B, C, D etc).
A lot of these spruiks are good for a laugh (not if you’re the investor of course) but I think the funniest of all is the HIA-Commonwealth Bank Housing Affordability Index.