(ACHL), a company I've been watching for a while, had a 10-for-1 stock split on 4 November 2009. How is this shown on the chart on
How about on
Google Finance? By a catastrophic collapse in the share price:
Seriously - not even a hint as to what actually happened? Yes, there is a "Splits" checkbox in the chart settings, but whether that's ticked or not doesn't make any difference.
Google Finance is in good company, the London Stock Exchange website also represents this split by nothing more than a huge drop in price:
Be wary of share price data: check multiple sources if something looks strange.