Stock market trends are unpredictable — invest with caution.
Tips
history
From Han Yu's (韩愈) Tang-dynasty epitaph 《殿中少监马君墓志》: 见王于北亭，犹高山深林巨谷龙虎，变化不测，杰魁人也 — describing a presence as unfathomable as dragons and tigers among mountains and forests.
memory
Decode literally: 变化 (changes) + 莫 (no one) + 测 (can predict) → 'changes that no one can predict.'
