If I had bought BIIB
If I had bought BIIB
Dates within the last week use the minute candle — accurate to the minute of purchase.
Ready examples: $100 put into BIIB
a week ago-4.0%$100 → $96
a month ago+9.6%$100 → $110
three months ago+16.9%$100 → $117
since our history starts, August 5, 2026+16.8%$100 → $117
Dates within the last week use the minute candle — accurate to the minute of purchase.
A year of buying BIIB
Over the last 93 days BIIB closed between $203.48 (August 11, 2026) and $257.09 (October 31, 2026). One hundred dollars put in at the low would be worth $120 today; at the high, $95. The current price $244.25 is above 79 of those 93 daily closes, so a purchase on a random day of that stretch would be in profit 85% of the time — fees aside.
A typical day moves BIIB by 3.3%: a $1,000 position swings about $33 a day.
Low of the stretch$203.48 · $100 → $120
High of the stretch$257.09 · $100 → $95
Share of profitable dates85% · 79/93
The same calculation for neighbouring instruments
Calculators for other instruments in the “company stock” category.