What Is a Stock Split? How Splits Work and Why Companies Do Them

What is a stock split?

A stock split increases a company's share count while proportionally reducing the price per share. The total market capitalisation remains unchanged.

Example: 2-for-1 forward split. You own 100 shares at $200/share = $20,000 total value. After the split: 200 shares at $100/share = $20,000 total value. Nothing changed except the denominations.

Why companies perform forward splits

Accessibility. After years of appreciation, a stock can reach a price that feels prohibitive to retail investors. Nvidia hit $900+/share before its 10-for-1 split in 2024. At $90/share post-split, a much wider audience can invest in multiples of a single share.

Liquidity. Lower share prices attract more trading volume, tighten bid-ask spreads, and improve the stock's appeal for options market makers (who need affordable strike prices).

Psychological signal. Companies typically only split when shares have substantially appreciated — so a split often signals sustained business success. It doesn't cause future outperformance, but it often accompanies it historically.

Notable forward splits

Apple: Has split 5 times since 1987. 4-for-1 in August 2020 (shares were $400+).
Tesla: 5-for-1 in August 2020 at ~$2,000/pre-split share.
Alphabet (Google): 20-for-1 in July 2022, reducing the price from ~$2,800 to ~$140.
Nvidia: 10-for-1 in June 2024, reducing the price from ~$1,200 to ~$120.

Reverse splits: a different story

A reverse split reduces share count and increases price (e.g., 1-for-10 turns 100 shares at $2 into 10 shares at $20). Motivations:

Avoiding exchange delisting (NYSE/NASDAQ require minimum share prices, often $1–$4)
Making the stock more attractive to institutional investors who avoid very low-priced shares

Reverse splits are generally bearish signals. They often occur after a stock has already declined 80–90% and the business is in distress. While not automatically fatal, the majority of reverse-split stocks continue declining afterwards.

Key takeaways

A forward split: more shares, lower price per share. Total value unchanged.
Done to improve accessibility and liquidity after significant price appreciation.
No fundamental change — but often signals a history of strong performance.
Reverse splits reduce share count and raise price — usually a warning sign of a struggling company.

Frequently Asked Questions

Does a stock split increase the value of my investment?

No — a split is purely mechanical. A 2-for-1 split doubles your shares and halves the price. Your total holding value is unchanged immediately after the split. It's like cutting a pizza into 8 slices instead of 4 — the pizza is the same size.

Why do companies split their stock?

Primarily to reduce the share price and improve accessibility for smaller investors. A $3,000 share (like Google/Alphabet before its 20-for-1 split) is expensive for retail investors and options traders. Post-split at $150, it's far more accessible and liquid.

What is a reverse stock split?

A reverse split reduces shares and increases price proportionally (e.g., a 1-for-10 reverse split turns 1,000 shares at $1 into 100 shares at $10). This is typically done to avoid delisting (exchanges require minimum share prices) or to improve institutional appeal. It's often a warning sign of a struggling company.

Do stock splits signal that a company is doing well?

Generally yes — forward splits happen when shares have appreciated significantly, which is evidence the business has been performing. Apple's 2020 4-for-1 split and Tesla's 2020 5-for-1 split both followed major price appreciation. However, the split itself doesn't change underlying value.